KTTA (Raleigh executive Jetport) has about 10 RV's of various types. Additional hangars are in the final stages of construction. A new "experimental" builder assistance hangar has established operation there as well.
The Bandit Flight Team (RV's, YAKs, and CJ) are based there.
There are a number of RVs at other airports in the immediate area, but depending on where you want to base the aircraft, hangars are available. Yes, you can fly year round in this area.
Oh, and RTP stands for Research Triangle Park.