Welcome to the area! The store is great - much better than the Hobby Chest up in J-Ville. The big gaming days are generally Thursday and the weekends, but there's usually something going on every day. Most of the board gamers hang out on a yahoo group. I encourage you to log in there, introduce yourself, and see what's going on:
http://games.groups.yahoo.com/group/wilmingtonbg/I live in the Lejeune area myself and usually get down to the store about twice a month (when I'm not on extended overseas business trips...). The group there plays a variety of games, including just about everything you mention below.