A late reply, but I just joined here a little while ago. Check out:
NEXTerra is a mostly-xterra group which wheels about once a month allover New England and New York; exploringnh does a lot of class VI roads in new hampshire.
I don't get out on the trails much any more but good luck with the search! If you're still looking for trails, I keep my 4Runner in VT at my parent's place and get out every one in a while for some wheeling
...just realized that this is from last year. Sorry for reviving a dead thread