We were just at Lake and Shore (Thousand Trails) on our zone pass. Lake and Shore has a beautiful beach and pool and is 5 miles from Sea Isle City. I think it would be difficult to get into during peak season...we were there in October and it was busy on the weekends but quiet during the week. Whipporwill, up closer to Ocean City, is a nice private CG. After The Jersey Shore, we took the ferry to Delaware and stayed at Cape Henlopen SP which was fantastic and bikeable to Rehoboth. Sea Isle City, Avalon and Stone Harbor all have great public beaches and boardwalks.