After Hatteras if you haaven't done it , Colonial Williamsburg and the old Jamestown fort, take the Chesapeake Bay bridge Tunnel (Rt 13) to the eastern shore. Then check out Chincoteague area and see the horses and the NASA facility, Dover Downs Casino does not have a CG but has two parking areas one on grass and the have a dump station for free. From there its easy to cut across to Baltimore and bayside. Before getting up into Pa, if you havent tried Harpers Ferry , its worth a side trip.
Williamsburg has numerous CG's Eastern shore does as well but FHU may be limited to W/E at a lot.
Happy Motoring