Booking rules by state
Great Lakes, state by state
Five agencies, five booking systems. Here's the one-line version of each, with the source.
- Michigan
Campsites and lodging open 6 months to the date before arrival, one day at a time.
Michigan DNR FAQ: Reservations, modifications and cancelations, checked November 2, 2026
- Wisconsin
Each date opens 11 months ahead at 9 a.m. Central, online and by phone at the same moment.
Wisconsin DNR: Camping Reservation Frequently Asked Questions, checked November 2, 2026
- Minnesota
Campsites and lodging open 120 days before arrival.
Minnesota DNR: Reservations — Common questions, checked November 2, 2026
- Ohio
Campsites open 6 months to the day before arrival: to arrive June 1, book from December 1.
Ohio DNR: Ohio State Parks Reservation Policy, checked November 2, 2026
- Indiana
Each date opens 6 months ahead at 12 noon Eastern, when the reservation phone line opens. Not midnight.
Indiana DNR: Camping Business Rules (PDF on Indiana State Parks Reservations), checked November 2, 2026
Sources
- Michigan DNR FAQ: Reservations, modifications and cancelations, checked November 2, 2026.
- Wisconsin DNR: Camping Reservation Frequently Asked Questions, checked November 2, 2026.
- Minnesota DNR: Reservations — Common questions, checked November 2, 2026.
- Ohio DNR: Ohio State Parks Reservation Policy, checked November 2, 2026.
- Indiana DNR: Camping Business Rules (PDF on Indiana State Parks Reservations), checked November 2, 2026.
Rules change. Always confirm on the official site before you rely on a date.