Diane - I just happened to find this campground, and I tent camped there in July 2004.
This is the largest state park in Michigan. It sits between Duck Lake and Green Lake. The staff is very friendly, and it has modern facilities like bathrooms and showers. There is fishing, boating, and swimming. It's close to many different things to do in Traverse City and western Michigan. It caters to RVs and rustic camping.