Are they handicap accessible? I thought State Parks were. How are they to get around the park with handicaps?

There is handicap spots, getting one may require calling the park being as most dont designate which ones are handicapped or available

Yes

Wheelchair. I don't remember at wilderness but most MI state campgrounds have handicap sites. They basically have special picnic tables, tend to have larger paved pads and closer to bath house. The facilities are handcap accessable but designed for wheelchair chairs, not golf carts.