I see this is a late reply to your post.
I usually sail in Avon, NC. Usually renting a house on the sound side. But there is Windsurfing Hatteras (they rent Waves and PWCs) and Outer Banks Expeditions (Kayak Rentals) that have water access. I bet for a small fee, they would let you store a boat there for a week if you asked. If you are willing to setup and breakdown, you could go out of Canadian Hole.
In Rodanthe, there is a race every year put on by Fleet 100 (NC) at Camp Hatteras. They have a ramp and storage area there as well. The race was in August and is a lot of fun. A bunch of us from Virgina (Fleet 32) tend to go down for it. Other rental companies are also in Rodanthe/Salvo/Waves with Sound access
Love sailing the sound! Good winds and low chop.