I am an Aggie, living in downtown Wilmington. With Camp Lejeune, New River, and Cherry Point all close by, there should be a decent showing of Aggies in the area, but I haven't seen anything organized yet, aside from the Triangle area A&M club in Raleigh. I usually get together with a couple of Aggie friends I know in Hampstead, or we meet up at bdubs.
As far as places to live, I would recommend Mayfaire, Monkey Junction, or downtown. If you're doing downtown, you should shoot for the south end and stay west of 4th street, or else push on out to 17th and above.