Howdy!
Ya, registration is a must, $30 for 2 years, and less hassle by "legalized" authority figures!
Finding riding places can be tough, no one wants to reveal their spots due to those few riders that ruin it for those of us that ride legaly and respect others private property.
We just lost a GREAT riding spot in Rhode Island because SOME riders couldn't stay away from privately owned sand pits and created burms in the middle of dirt roads. Nice guys....
So when you do find a riding spot, help us all out by riding responsibly!
(sorry, I'll get off my soapbox now :roll

.
One of my favorite riding spots, although kinda far for you, is at the intersection of Rts 495 and Rt 85 in Milford. Lots of trails and some rough trails for those that want to hone their "technical" riding skills.
Peace-out.. (did I really just say that?)