If you're going solo and care mostly about the skiing there is something to be said for building a list of possible places to travel and then making the choice a few weeks or a month out. This won't end up with the absolute cheapest trip, but could give you a better shot at great snow conditions. My short list would be (since I too don't care about night life)
- Big Sky / Moonlight Basin
- JHole / Grand Targhee
- Crested Butte
If you're coming Presidents day do everything you can to avoid Summit County CO -- even Loveland is packed that weekend. However there is merit to @skiNEwhere 's idea of a RMSP if you can sneak in more than one trip.
"Packed" is relative though. I was there President's day and I think I waited two minutes in line once