Being that you're talking about pre-Easter week, Killy should be good go. They'll be swinging reduced operations (fewer base lodges will be open), but it should still be good. This next storm of 1-1.5 feet should also help your cause. I'm not one to endorse places like Mt. Snow or Okemo, but its up to you. One of the big complaints about Killington is the crowds.....which will be very limited during the week of your spring break trip!
Have Fun! Also consider Sugarloaf, ME (Its a haul,but you're on Spring Break, so what....it can be worth it.) or Jay Peak, VT.
Sugarloaf also has a Reggae Fest durnig the first weekend of your SB.
Traveling the States and Taking Pictures