Wow, sounds like you're on the right track! I've heard good things about Huntington. Of course, the Outer Banks -- and in particular Cape Hatteras and Ocracoke Island -- offers excellent camping. Further south, Little Talbot Island State Park in northeast Florida is worth a look. Lastly, check out Virginia's Back Bay National Wildlife Refuge, which offers an awesome hike-in route to False Cape State Park and primitive, beachside camping at Barbour Hill (look out for loggerhead sea turtles, who nest on the beach between May and September!).