We hiked from Harper's Ferry to Pen Mar on the AT and used this fabulous campground as a base station the entire 5 days.  The level and semi-private sites were excellent, although there were no water hook ups at each site.  We were allowed to fill the camper with water before we set up, which worked out fine.

There is a swim area and some trails, but our focus was on the AT so we did not use them much.  The hosts were wonderful, bathroom facilities were older but well maintained, and the overall campground atmosphere was great!