I've rode here before.
Its in Bradford PA, That's on the other side of the state from MA though.
I've been to these a few times. Nice and well layed out. Still growing last I was there.
I take my jeep to Rausch on the OHV side, going there next weekend, never done the ATV side though.
Wellsville OH is just outside of Pittsburgh. That's my local stomping grounds. It's a free for all and a rather wild place if you like that kind of stuff. You need to go with someone that has been there before. Around 1000 acres, covered in trails, all difficulty level, no rules, anything goes, legal or not.