Let's get this straight. A State Park admission fee is rarely, if ever, associated with camping. It is an entrance fee entitling one to enjoy the amenities of the park, excluding camping. Please tell us in which states a park admission/entrance fee entitles one to a campsite. As someone noted, not all park users camp. The non-resident annual state park admission fee (Recreation Passport) in Michigan is $30.50. This entitles the holder to enter and use state parks, recreation areas, state forest campgrounds (camping fee is extra) and non-motorized trail head and boat launch parking until their current license plate expires (Best to purchase at the same time of plate renewal). It does not cover camping fees. It is meant to allow the holder to drive into the designated state area and enjoy its natural features and facilities. Because campgrounds are a distinct special use facility, campground fees are charged to stay in them.
Holland State Park-Beach Campground has full hookup sites with direct sewer, water and electrical hook-ups with 20/30-amp or 50-amp service for $33. This is definitely comparable to full hookup sites in private campgrounds, which by the way are not surrounded by a beautiful state park. Holland State Park also has Premium Modern Sites with 50-amp electric hookups, modern toilet buildings, showers, wheelchair-accessible sites and sanitation stations, some sites are pull through, for $29. The Modern Campsites at Holland State Park feature electric hookups (amps will vary), modern toilet buildings, showers, wheelchair-accessible sites and sanitation stations, some sites are pull through, for $27.
Porcupine Mountains State Park has Modern Sites with electric hookups (amps will vary), modern toilet buildings, showers, wheelchair-accessible sites and sanitation stations for $25. I've stayed at the Rustic Sites at Presque Isle in 1985, way before they were $14. Great place to pitch one's lean-to.
Tahquamenon Falls State Park has Modern Sites with 50-amp electric hookups , modern toilet buildings, showers, wheelchair-accessible sites and sanitation stations for $23, and 30-amp Modern Sites at the Lower Falls/Rivermouth for $21. A great place to stay and explore, I'd recommend it to everyone.