My DD stayed at Brimley SP and said it was really nice.
My favorites in Michigan are:
Woodland municipal CG at Grand Marais (right on Lake Superior)
McLain SP north of Houghton, great views of Superior and an ice cream shop in the park
Ontonagon municipal CG, some sites have lake views
Porcupine Mountains SP, east and west units
In Minnesota, all of the state parks along the Superior shoreline are nice but they can be full in summer. If so, there will probably be space at one of the forest campgrounds. Last time I was up that way I tried Tettegouche but it was full, so I went to Eckbeck CG just a couple miles away toward Finland and there were plenty of open sites. After 2 nights there I went up the Gunflint Trail and spent 2 nights at Bearskin Lake... the loudest noise most of the time there was the loons, a good noise to have. BTW there is a free RV dump station in Silver Bay. If you are able to stay in a state park CG, you usually have nice trails from the CG right to the river, waterfall(s), and Superior shoreline.
