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).
Mon.-Sat. 10-6, Sun. noon-6, Memorial Day weekend-Labor Day; Tues.-Sun. noon-5, day after Labor Day to mid-Dec. and mid-Jan. through the day before Memorial Day weekend. Allow 30 minutes minimum.