Is there another mountain (in the EAST) that we should consider?
Tourist that I am, I have skied Killington several times on Prez Weekend, although not in the last five years. It will be very crowded. But I like the ski area. You sound young and aggressive and should be able to navigate or avoid the clogged up groomers. There is very good terrain for all levels - groomers/bumps/trees, great snowmaking, and a big spread of trails to explore. If you go there at that prime time, stay away from the main base area around the K-1 gondola as much as possible. Access the hill in the mornings from Bear Mtn or Skyeship Gondola base station if possible. Believe some of the lifts serving expert terrain like Canyon Quad, Bear Mtn will not be killer crowded. South Ridge Triple might also be good for lesser crowds. Assuming your ticket will cover it, maybe on the busiest afternoons drive over and ski Pico to also avoid crowds.
Other folks suggestions are very good too. The Maine areas should be less crowded, but are a long drive. Love MSA and Le Massif, but long drive too. I would think the single chair at MRG would be a big bottle neck on Prez Weekend? Sugarbush has a pretty big trail count between its two mtns and might be a little less crowded than Killington at that time, esp. Mt Ellen.