NR 45.12(1)(bm)
(bm) The following state parks, recreation areas, forest recreation areas and state natural areas are designated by the department as areas in which vehicle admission receipts are required, except as otherwise provided, from January 1 through December 31:
NR 45.12(1)(c)
(c) The following areas are determined by the department as properties in which vehicle admission receipts are not required:
NR 45.12(1)(c)6.
6. Peninsula state park golf course (May 1 through October 31); applies to golfers and clubhouse patrons only