There’s a ton of camping at Elk Neck, including a loop with full hook ups. In the full hook up loop pay close attention to the lengths specified. The actual pads are fairly level but some of the driveways to them are very sloped. Long rigs will have issues in a few of the sites.
There’s a camp store, boat ramp, swimming, fishing and lots,of great hiking. Definitely drive to, and then hike to the light house (open most weekends) the light house and the view are definitely worth it.