Hawn State Park is tiny but excellent. There is a main loop of campgrounds all facing one another (e.g. little to no privacy) with electric hookups and reservations allowed (these fill FAST) then there are a few primitive walk up sites for tents only (no hookups, no reservations), and these are what I most recommend. You can camp right by the gugling creek with total privacy. Campgrounds have running water and showers from Memorial Day to Labor Day.

The park itself has lots of great hiking trails with unique ecology, geology, and plant life.