MarylandBimmr, According to your profile, you claim Ski Liberty and Whitetail as your home mountains. They are the closest to you in Maryland and if you have never been there they would be a good start. However, since they are close to MD, VA, and DC they get the most crowds on the weekend. Whitetail is bigger at 900 vert but since it faces South, they get the worst conditions when it gets warm. Liberty at 600 vert is allright but both mountains lack in difficult terrain. Again, according to your profile, you have skied alot and have top of the line equipment so you probably like tougher terrain. Another option would be to head towards Harrisburg and go to Ski Roundtop. It is run, very well, by the same folks as Liberty and Whitetail. You will find that the East side of the Mountain has the best terrain and you won't stand in lift lines like those on the begginer slopes on the West side. Ramrod is a very good black diamond top to bottom and is steeper than anything at the other two. The last time I checked, Gunbarrel was open but only the lower section. That's ashame because the top is one of the steepest slopes you can ski on the East Coast. The other blacks are fairly tame except Upper Lafeyyete which is usually bumped up and iced over. Barret's Trail is narrow and has the best snow on the mountain. The blues are nice wide open cruisers if you can avoid the masses. Give it a shot it's not bad for a little 600 foot vert mountain. I learned to ski there as a kid and I have taken it all over the world since leaving PA.
If you want really good expert terrain in Pennsylvania go to Blue Knob but only if the weather is good and they have had plenty of natural snow to open everything up. Otherwise, go elsewhere.
By the way, if you feel like making the drive, Elk Mountain is another good choice and should have good coverage up in the Poconos. Look into Montage which is near Scranton as well.