My family camped at Muskallonge Lake State Park in the Upper Penninsula of Michigan some years back before I was really into astronomy and while doing some research I learned that it has Bortle 1 skies. I think this is the closest Bortle 1 to my house in Central IN
When we were there it was a great time. The State Park has a great campground with private showers with individual doors and individual areas to change, etc. Campground is nicely shaded, but I think there's areas of clearing around the area for setting up scopes, etc. I really want to go back soon. Its close to Pictured Rocks National Lakeshore as well.