S.N.
Not exactly sure if this is what he's looking for but there is a cool campsite right here near my house. We live in base housing for Camp Pen but we are actually off the base - in San Clemente off the Christianitos freeway exit. It is the very North end of the base. Anyway, the campsite is called San Mateo campsite. It's not on the beach but it's only about a mile from the water. You just make a right off the freeway and the campsite is up about a mile on the right hand side.