Man, this question has been asked so many times in threads...
Something I wrote in an old thread:
"...parks at Jay kind of suck. the 720 park is located on the state side but it's pretty shitty, the features are really big (including a MASSIVE rainbow rail that I don't think I have ever seen anyone hit). A few weeks ago they had a cool cannon rail/box. Jumps are pretty fun, they have a couple of step-overs, decent sized and pretty fun."
I prefer the 360 park on the tram side because you can hit some trees/bumps and cut into the 360 park on the way down because it's right before the lift. Small jumps, medium size rail/boxes.
You shouldn't go to jay to ski park... They are (one of?) the only mountains on the east coast that is still 100% open so get there and ski some sick glades while you can.
