On your way up if you take I-75 stop in Frankenmuth. Go to Zender's bakery for some wonderful goodies. Great place for lunch too, or a good chicken dinner if you stay in the area. Campgrounds close by too. Traverse City, rethinking staying outside the area is good. Its just a big city today. The Leelanau Peninsula is a better choice plus you are in Michigan wine country. A few nice CG's there too. Stay in an area a few days at a time and use it as a base, there is plenty to see. The ship wreck museum at Whitefish Point is not to be missed. Mackinac Island is unique.