I have done 3/4 of it, do some research, you will want to extend your trip! Tons of sweet things to see. If you can, drive up to Copper Harbor on the tip of the Keweenaw Peninsula (UP of Michigan) You can also take a day trip out to Isle Royale. Eat at the Harbor Haus http://www.harborhaus.com/ If you time it right, get there Oct 17-19 and catch a few stages of the Pro Rally http://lsprorally.com/
Don't forget the Mackinac Bridge, Soo Locks, Pictured Rocks, (all in the UP) A couple hours out of the way, and on the top of the wrong lake, but worth the trip is the Sleeping Bear Dunes. http://www.sleepingbeardunes.com/ Also check out cities Petoskey, Charlevoix, Traverse City and Bay Harbor.
In WI, check out towns such as Minocqua, Eagle River, Ashland, Bayfield. You know MN already, and I don't know much about the top side of the Lake. I can just help you with WI and MI.