We will be driving across northern WI into MI's Upper Peninsula for about a week around the middle of September. I've convinced myself and my DH to go without reservations and see where we land. A part of me loves the freedom this will give us but another part of me is freaking (which is a part of why I want to do this). So...for those of you that are brave enough to go reservationless....I am asking for your advice on what are the best bets for finding a campsite in the UP in September or any extra tips for going reservationless. And also looking for advice on the best parks, must sees and don't misses. I would love to make it to Sleeping Bear Dunes but I doubt we will make it that far. So any info from WI up to that point would be appreciated. Thanks much.