Coming home from MB try the AF Camp at Fort Fisher, then up to Atlantic Beach then cross to go up to Swansboro and take the ferry to Ocracoke, ferry again a day or two later up to Hatteras, then Hatteras, Kill Devil Hills and up to Chesapeake.
That region is beautiful and temperate in the fall.
Ocracoke is quaint and not crowded after Labor Day, Hatteras is a little busier, KDH and the aerial activities from just visiting the Wright Brothers memorial, to hang gliding, parasailing and other similar activities at Kitty Hawk Kites can easily fill a couple days.