Rausch Creek is the place to go. Everything from easy trail riding to break your axle rock crawling
From NYC your looking at 3-3.5 hrs. Keep an eye in the trails section for groups getting together. I usually try to get there quite a few times during the warmer weather season. This year is kinda tough with wedding expenses but I'll still make a few trips.
BTW...if you walk up to a group of guys in the camping area and introduce yourself I'm sure they wouldnt mind you tagging along in the group.