Townsite free. Park entry requires a Recreation Passport (valid for 1 year and allows entry into Michigan state parks) $11 (per private in-state vehicle); $5 (per in-state motorcycle); $31 (per private out-of-state vehicle). Nonresident single-day pass $9 (per private out-of-state vehicle).
Museum buildings open daily 8-dusk, mid-June through Labor Day; 9-6, day after Labor Day to mid-Sept.; 9-5, mid-May to mid-June and mid-Sept. to mid-Oct. Park open daily 9 a.m.-10 p.m. Phone ahead to confirm schedule.