Good Time Campgrounds

I am looking for a beach that is close to the DC area that can be done in a day with good campsites.?
the limit is 3 hours maximum time of transmission and is a good price Hotel with 2 rooms, or camping is cheaper than somewhere nearby. go with friends, so prices will be divided. I've looked at the beach Dale, OC and Assateague. and suggestions?
I suggest Ocean City, Maryland. It's really nice there. Good luck!
DMB Noblesville, IN. Verizon Campgrounds Bonfire