[williecoyote]

Procon is right about slacking down your tires to 15-20 psi. Then you can pretty well go anywhere in the sand. At low tide the sand is pretty hard near the water. ( IT is salt water, so don't get it all over your nice Toyota. Rinse underneath real well when you get back to where you're staying.)
Must see:
-The Wright Brothers Monument
-Cape Hatteras Lighthouse
-Take the ferry to Ocracoke (Blackbeard's old stomping ground) That's a nice day trip. Be sure to go early though because the ferry lines get longer as the day wears on. (Blackbeard's treasure has never been found. You might get lucky.)
-Go to Corolla, and drive on the beach. It is a wild horse sanctuary. You usually see them roaming around.
-The Lost Colony is an outdoor play which is performed in Manteo. Andy Griffith was an actor in it back when he was a young aspiring actor.
That ought to keep you busy for a little while. Did I mention the fishing?