I stopped riding Jersy about 5 years ago when the Green patorls started getting very aggresive and tripping all over themselves to protect the sand. Alot of my frineds continued to ride over there until they had run ins and or fines. I dont know anyone that rides there anymore.
But if you want to ride Jersy here are some tips.
Get your thumper street legal, for some crazy reason they claim that the sand trails out there are state rodes, so if you have a plate, your golden, take your camera along to get plenty of shots of stunned and stupified rangers and cops as they barrel toward you to slap the cuffs on only to realize your legit :).
Contribute to global warming in every way possible so that New Jersy becomes mostly flooded and uninhabitable at wich point they may let you ride there but probably not since they will call it a protected wet land.
If you do dare ride out there and you get popped, just claim your dumping chemicals so NJ can get more superfund $$$$ and or organizing terrorist attacks and tell them you saw some kids riding quads just over the way and they will leave you alone and chase off after them.
Of corse Im kidding, but the point is NJ is a joke and the head clown is on her way back to the big top from her stay in D.C. so dont expect it to get any better over there, bite the bullet, get a pickup, drive an hour and a half to spend you money somewhere else and ride legaly so the garden state can continue to cultivate chemical dumps, sand, oh and the chief export, pine trees. Its not worth getting your bike impounded and the fines.
Did I mention how I felt about NJ? LOL.