Our family from up north used to rent a house in Duck for a few years for a week and we'd all pile in. I still prefer south of Hatteras. It is nice and quiet as it is way up there. We piled in trucks and drove on the beach to VA. On the beach your best bet looking for changes in the beach. If you want to go on a boat you'll need to head down south to Wancheese or Manteo or go farther south to Hatteras for additional surf fishing. Note the beach is for 4x4 stuff only not AWD or corvettes as the sand is very soft and deep when you first get on, air down. The locals have no problem taking pictures of your stuck butt and laughing when ya tried to drive a car on the beach. Check out the facebook page Outerbanks idiots. I think the rules for driving on the beach are changing this year so check out the gas station on the left in Duck (if going north) for the proper permits etc. Up there, they are obsessive over the horses don't go close or they'll fine ya. Check out the waterfowl museum and if you want to spend a little the Whale Head Club. I climbed the lighthouse for fun, good views. Many of the stores are manned by European Students on summer vias some were pretty fun to talk to.
At the Manteo airport I think the guy just got a T-6 this winter to add to his WACO if you are into WWII aviation.
Also for anyone else reading if you have a family member that can't walk to well, flag down the police driving by. Once they found out my grandmother needed help they drove her to our beach spot from the house 3rd row, a few times out of courtesy.