I've been to Blue Mountain. It has the highest vertical in PA and has 3 terrain parks, a beginner, intermediate and advanced. Last year the snow was so bad that they couldn't open the big park until the end of the season. Blue is like 90 minutes from Philly.
There is also Bear Creek Mountain which is only about 75 minutes from Philly. It is a pretty small mountain but they have two nice terrain parks. I went there mostly last year as I tried to focus mostly on park.
I'll probably be spending most of my time at those two mountains this year. Blue Mountain also has a Big Air Bag that I will be utilizing a lot this year as I fucked my back up pretty good last year just hucking myself off jumps trying to learn tricks the hard way.
Send me a PM when you get a chance.
My name is Nicky, but you can call me Dre.