Here are a few ideas:
Kiptopeke SP on the lower Va. Eastern shore, Chesapeake bay beaches, boat ramp, fishing pier are in the park. Full hookups available. Been there many times, nice place.
http://www.dcr.virginia.gov/state_parks/kip.shtml
Assateague SP on Maryland Eastern Shore, not far from Ocean City. I`ve been there but never camped there and have reservations in the H loop for August, the only electric loop in the park and very hard to get reservations for, they book up a year in advance. There are non electric sites still available but they will go soon as well. This CG is right behind the duneline, so a short walk to the beach and a short drive to the OC attractions.
http://www.dnr.state.md.us/publiclan...assateague.asp
Tall Pines Harbor on central Va. Eastern shore. This is a nice private CG with many themed weekends throughout the season. Waterfront sites are available but a bit pricey, they overlook the Pocomoke Sound which is part of the Chesapeake Bay.
http://tallpinesharbor.com/
Pocomoke River SP in Maryland. This park is located on the Pocomoke River. Wooded sites, nice SP with many river activities available. Not on the Chesapeake, about a half hour from OC and the beaches.
http://reservations.dnr.state.md.us/...&parkId=380508
Janes Island SP near Crisfield Md. Some waterfront sites available, they are on a tributary of the Chesapeake bay with the bay only a few minutes away. Theses Marlyand parks have electric only, no water or sewer.
http://www.dnr.state.md.us/publiclan...anesisland.asp
Cherrystone CG. Another private CG overlooking the lower Chesapeake Bay, many family oriented activities there. Also considerably more pricey then the State parks as expected.
http://www.cherrystoneva.com/welcome-to-cherrystone
These are just a few ideas, I have been to them all. There are several private CG`s on Chincoteague Island and near Ocean City as well that I have not been to yet.