This is a group area at Ocean City, its not reservable, but is first come first serve.
One of the campgrounds at Ocean City. They are surrounded by trees and offer a better wind break. The beach is back behind them and is accessible via a path.
After you walk down the path to the beach you pass by the group area at the top of the page and then come to a stretch of dunes, where this video is shot : Video of Dunes