We know you are new..
GOX is the Gathering of Xterras, it is held in Colorado.
There are a lot of regional clubs covering PA / NY / and other regions, but really you and I are way out of the loop.
Its a good three hours to the Western PA Xterra Club. MAXC (Mid-Atlantic Xterra Club covers these states but is mostly centralized in NJ. The places they wheel, while being 1-3 hrs from them are 3-7 hours from you and I.
I have some great stuff around me, they even run a Jeep Jamboree in my hometown, so the trails are there, but its hard to get 10 people to travel 3 hours here... when I could just go there.
I have a pretty well built Xterra... just ordered a Shrockworks Bumper and Sliders, 3" lift, 265/75/16 Bridgestone Dueler AT Revos, and some other small stuff. If you're ever down in the area, drop me a line. I usually run solo so having some company would be nice.
Ran into a guy in a Rubicon at the bike shop today and we spoke briefly about forming a local 4WD club, non-denominational of course.
So, if you have any questions, feel free to drop me a line here, PM me.
I answered your E-ville question in the HEY thread in the General forum.
Take it easy.
-Jeremy