I went to Elk Mountain on the Sunday of President's Day weekend and I could not have had a better experience. The lift lines were relatively short for a holiday weekend. The snow was excellent for the East Coast. The staff was friendly and very willing to help.
The feel of Elk Mountain is of a "throwback" ski resort which I think adds to the charm. The lodge is very busy at lunch time and the prices are typical of any ski resort (high).
The black diamonds are challenging and the runs are decently long for PA skiing. I would not recommend bringing a beginner to Elk. There is a bunny hill for learning, but after you progress past that level, there are very few green circle trails.
Elk Mountain is well worth the extra 45 minute drive from the Philadelphia area. I look forward to going back to Elk before the end of the season!