You can try the VT board on mtbr.com. I know of some really good VT riders that post there from the Waterbury area - someone on there might know of some good zones in Killington.
If it's true VT sniggle then it might be a little on the tough side to find. The locals don't tend to give out the best trails to tourists especially ones that have Garden State written on their plates. Get in with the locals usually at one of the shops - ask about a shop ride, a local tour guide, or trail maintenance day.
If you know what you're talking about, tell them that you are involved with trails in NJ, and aren't a kook, they'll hook you up. Make sure to ask them what their favorite brew is and bring a bunch for post ride or for the shop fridge.
For some, it might seem like a pain in the ass, but sampling good VT trail is one of the best feelings you can ever have as a rider.