We're going to head up to Sleeping Bear Dunes in a month or so and would like to know if anyone has recommendations on good campgrounds and places they think are worth seeing. We are interested in staying a day or two around Muskegon or Luddington, then heading up to Sleeping Bear for a couples days and returning along the same route.

I have not been to this area since I was a kid, so I remember it as being quite beautiful, but with no real recollection on the places we visited.
Except for one hella cool ride on the dunes in a tour buggy, which I think was near Muskegon because that's where our cousins lived.