Welcome!
Edit: You'll like 6MR like mike said...
mercer county park isn't too much farther than 6mr for you - similar style trail riding.
good step up would be chimney rock - just stay on 287 or 78 into bridgewater area, not too far off the highway. get someone to give you a tour there. lewis morris is between them skill-wise, but a little farther drive (get on rt 78 to 24) - lots of fun, and a couple of weekly rides.
if the outer bridge is open, then hartschorne/huber would be close too -