There are several PA groups (Philly, Pittsburgh, Tamaqua, Reading, State College, York/Lancaster) according to: http://boards.theforce.net/FanForce_USA_-_NorthEast/c10016/
I would test the waters before jumping in, especially if some of the OT.com activities are you area of interest, some of the fans over there might not see things the same way...
i have to say, doing SW fandom has been nothing but a rewarding blast for me. i've loved every minute. even as a prequel hater, i've made so many great friends and had so many fun conversations.
i'd definitely recommend starting with your area's board at FanForce, as none suggested--there may already be something going on you can participate in, or maybe get involved in planning and helping with events.
have fun and good luck!