Close to Lake Superior, keep your eyes open for wild blueberries and thimbleberries (the latter look and taste similar to raspberries but with smaller seeds and mush up more easily, and the plants have much larger leaves).
Fayette SP is an interesting historic site. Like Dewey02 said, don't miss Palms Book SP. Have a pasty while you're in the UP... with gravy, not ketchup!
The bakery in Mackinaw City has great bread and baked goods, about a half block north of the boat dock parking lot entrance. Their pecan rolls and cinnamon bread are my favorites.
Mike G.
Liberty is meaningless where the right to utter one's thoughts and opinions has ceased to exist. That, of all rights, is the dread of tyrants. --Frederick Douglass
photo: Yosemite Valley view from Taft Point