Consider the following:
Batchawana and Pancake Bays for camping
Wawa of course to see the Big Goose
Sibley Provincial Park and Ouimet Canyon
The petroglyphs along L. Superior
The whole Minnesota Coast with Split Rock Lighthouse is amazing
The western U.P. of Michigan is fantastic too
A few of us are talking about a similar trip, with a 3 day stay at my brother’s cabin near Sidnaw, MI.