What’s Closed, What’s Changed, and What’ll Cost You: A Wisconsin Camper’s Guide to the 2026 State Park Season

Construction closures, brand-new reservation fees, and the rules that catch people at the gate. Everything here links straight to the Wisconsin DNR so you can check it yourself.

Here’s something I’ve learned scoring campgrounds all day: the worst camping trips usually aren’t bad campgrounds. They’re good campgrounds you showed up to on the wrong week, with the wrong information, after the rules quietly changed.

That’s the whole reason TrustedCamp exists. I score the camping experience at more than ninety Wisconsin campgrounds from years of real guest reviews, so you know what you’re walking into before you book. But scores only tell you part of the story. Some things you just need to know before you load the car. A park being torn up for construction. A free paddler’s spot that suddenly costs money. A firewood rule that gets your wood confiscated at check-in.

So I pulled the 2026 season straight from the Wisconsin DNR, every closure, every fee change, every standing rule that trips people up, and put it in one place. Every single thing below links to the DNR page it came from. Don’t take my word for it. Click through and check it yourself, because the DNR updates these pages as plans shift, and a date that’s true today can move by the time you read this.

Let’s get into it.

The big one: Big Bay State Park is closing for almost a year

If Big Bay is on your list, read this first. The entire campground and beach parking lot shut down right after Labor Day weekend 2026, closed September 8, 2026 through roughly the end of June 2027. The park itself stays open for day use, but the camping is gone for the better part of a year.

The work is real infrastructure: road repaving, a culvert replacement, road widening, more overlook parking, and a renovation of the park office and the campground shower building. Day-use areas stay accessible with limited parking at the park office and Point Picnic Area.

Here’s why this one stings more than a normal closure: Big Bay is on Madeline Island. You get there by ferry. That makes it one of the most logistically involved parks in the state on a good day, and with no confirmed reopening date, anyone who had this on a bucket list needs to plan for 2027, not hope for a late-2026 window. The DNR ties the completion date to weather, the ferry schedule, and road restrictions, so it’s genuinely up in the air.

Move worth making: go to wisconsin.goingtocamp.com and use the “Notify Me” button so you get an alert the moment 2027 dates open.

Source: Big Bay State Park Conditions, Wisconsin DNR (updated 10/1/25)

The change most paddlers haven’t heard about: free water-access sites now cost money

This is the one that’s going to catch people off guard, and it’s the one I’d most want a paddler friend to know.

Turtle-Flambeau Scenic Waters Area used to be a secret you just showed up to. Not anymore. Starting in 2026, all sixty-six remote water-access-only campsites require a reservation and a camping fee, May 1 through November 30. These were previously walk-up sites. Reservations opened June 1, 2025 and can be booked up to eleven months out. You book at wisconsin.goingtocamp.com using the “Boat-in” filter, or by phone at 1-888-947-2757. There’s one ADA site (A1) you can reserve at no charge by calling the Mercer Ranger Station at 715-614-5120.

Two things the DNR flags that are worth repeating. First, these sites are primitive: no water, no trash pickup, you carry everything in and everything out. The reservation requirement doesn’t change that experience, it just means failing to book ahead now means you don’t camp. Second, the area has bears, and the DNR specifically calls it out and links to a bear safety page. If you’re camping Turtle-Flambeau in 2026, read it before you go.

Source: Turtle-Flambeau Scenic Waters Area Camping, Wisconsin DNR

Willow Flowage Scenic Waters Area is making the same move. Some campsites there now require a reservation and a camping fee, also May 1 through November 30, with reservations available beginning June 1, 2025 at wisconsin.goingtocamp.com.

Source: Willow Flowage Scenic Waters Area Camping, Wisconsin DNR

If you’ve been treating these flowages as your free, no-hassle backcountry option, that era is over. Plan accordingly.

Parks open, but with real construction you should plan around

These parks are operating, but pieces of them are torn up. None of this should cancel your trip. It should just shape which sites you book and which weeks you pick.

Mirror Lake State Park. The Sandstone Ridge and Cliffwood campgrounds are closed February 1 through early August 2026. The good news: Bluewater Bay Campground is open and running normally, so the park is very much still in play. The accessible cabin is closed May through August 3. The boat launch, fishing pier, and a vault toilet are closed most of the summer, and the beach closes specifically May 14 through 22. A couple trail notes: the Echo Rock Trailhead is closed during construction (use Ishnala and Cliffwood Coulee instead), and the Wild Rice Trail is closed from an ongoing lake dredging project. The DNR notes they may open partial sites on weekends, so set a “Notify Me” alert if you want a shot at the closed loops.

Source: Mirror Lake State Park Conditions, Wisconsin DNR (updated 5/15/26)

Buckhorn State Park. The main sixty-site campground stays open, but specific site groups close on rolling dates through the season. This is exactly the kind of detail you almost never find in one place, so here it is, straight from the DNR:

• Sites 4 to 7, 8, 9, 10 to 25, and 199: closed April 1 to June 13
• Group Sites A1 to A8, B1 to B3, and Sites 30 to 45: closed April 1 to June 30
• Sites 26 to 29: closed May 1 to 22, then again May 26 to July 17
• Sites 1 to 3 and 20 to 22: closed August 1 to October 10
• Accessible Cabin: closed August 1 to October 15 (open May 1 to July 31)
• Boat Launch A: closed February 1 through early June, targeted to open by Memorial Day weekend
• Beach Parking Lot: under construction August 1 through October 2026

If you’re booking Buckhorn, cross-check your dates and your site number against that list before you reserve.

Source: Buckhorn State Park Conditions, Wisconsin DNR (updated 1/8/26)

Potawatomi State Park. A big infrastructure project, road construction, water line replacement, and an electric service upgrade, affects the entire Daisy Field campground, the group campground, the south shore shelter, the universal fishing pier, and the accessible cabin. The campground opens for the season May 29, 2026. The South Shore Shelter is closed January 1 through September 2026 in the reservation system. There’s an upside on the far end of the mess: they’re adding bicycle lanes in both directions on South Norway Road, a genuine long-term improvement even if it’s a headache this year. The Ice Age Trail is expected to stay open, with caution at road crossings. One more for Door County trip planners: the new Visitor Center is closed Monday through Wednesday through the end of May 2026, then open daily 10 a.m. to 5 p.m. starting in June with extended Friday and Saturday hours.

Source: Potawatomi State Park Conditions, Wisconsin DNR (updated 5/22/26)

Peninsula State Park, Tennison Bay. All shower buildings in the Tennison Bay Campground are being renovated in two phases. Phase 1 (April through July) closes the three shower buildings nearest sites 226E, 312E, and 425E. Phase 2 (August through December) closes the two nearest sites 322E and 476E. Showers stay available elsewhere in the campground throughout. Seven campsites are closed for the full season as contractor staging areas: 222, 226, 333, 360, 425, 426, and 427. Expect weekday construction noise from 8 a.m. to 6 p.m.

Source: Peninsula State Park Conditions, Wisconsin DNR

Governor Dodge State Park. This is the most ambiguous one on the list, so I’ll be straight about that. Road, retaining wall, and water system projects run throughout 2026, affecting the Twin Valley Campground, the Group Camp, the Equestrian Campground, the Cox Hollow picnic area and boat landing, and the Enee Point shelter and trailhead. Expect daytime noise and dust, with possible single-lane traffic and detours. The DNR has not published specific site-level closure dates for this park, which is unusual. If Governor Dodge is your 2026 plan, call ahead before you book.

Source: Governor Dodge State Park Conditions, Wisconsin DNR

The rules that get people at the gate

These aren’t new, but they catch somebody every single season, usually at check-in, usually with a trunk full of firewood they’re about to lose.

The 10-mile firewood rule. You cannot bring firewood into a Wisconsin state park from more than ten miles away from the property. This has been permanent since June 1, 2014 and it’s actively enforced. Show up with non-certified wood from outside that radius and you’ll be asked to surrender it. The legal workaround is DATCP-certified firewood, look for the seal, which you can bring from anywhere in the state. There’s a firewood info line at 1-877-303-WOOD (9663), and firewoodscout.org will find retailers near any park. Also banned, and this surprises people: full or partial pallets, painted or pressure-treated wood, and composite or chipboard. They’re health hazards when burned.

Source: Firewood Rules and Resources, Wisconsin DNR

The spongy moth quarantine. Moving firewood from quarantined to non-quarantined counties is prohibited. This one bites people who camp in eastern Wisconsin and try to haul leftover wood home or to the next stop. Simplest rule that keeps you clean: burn what you bring, leave nothing behind.

Source: Firewood Rules and Resources, Wisconsin DNR

The one tool nobody’s using: “Notify Me”

If you take one practical thing from all of this, take this. Every park with construction closures lets you set an email alert for when specific sites reopen. It’s underused and it’s exactly the right move for anyone targeting Mirror Lake, Buckhorn, or Potawatomi this season. Go to wisconsin.goingtocamp.com, search the park and your dates, and when sites are closed, the “Notify Me” button appears. Set it and let the system do the watching for you.

Reservation system: wisconsin.goingtocamp.com  ·  Reservation line: 1-888-947-2757  ·  DNR general contact: 1-888-936-7463

Check it before you go

One thing the DNR states on every conditions page, and I’ll repeat it because it matters: all construction dates are subject to change. Everything in this guide is accurate as of May 25, 2026. Some of these DNR pages were updated within days of that; others may shift after it. So treat this as your starting map, not the final word. For any park you’re headed to, click its DNR link, confirm the dates still hold, and set a “Notify Me” alert if your site’s in a closed window. The DNR page is the live authority. This guide just gathers it in one spot so you know what to look for.

That’s the whole point of TrustedCamp. Not to tell you where to go, but to make sure that wherever you go, you already know what you’re walking into. The scores tell you how the camping’s been. This tells you what’s standing between you and the campsite this season. Now you’ve got both.

Verified against Wisconsin DNR pages as of May 25, 2026. All construction dates and fees are subject to change per the DNR; the linked DNR pages are the live source of truth, so confirm current conditions there before booking. TrustedCamp is independent: no sponsored listings, no paid placements.