Sleeping Bear Dunes National Lakeshore camping

If you don't have a reservation by now, you won't get into one of the reservable sites in Platte River campground. That's also true of the State Parks in that area also. Further north you will find better chances for a reservable site. Your chances of getting into one of the non-reservable sites is hit and miss. So how lucky do you feel?

On Edit - I had forgotter but just thought of; your best bet may be Interlochen State Park just a bit down the road.