concordia ski club goes to stowe on feb 15, lift+bus for 60, leaving early morning from downtown montreal, and back in the evening, pretty good choice. http://www.surfthesnow.org/schedule-tickets/
if you come ski at Sutton on Sat, you will stay around mtl Sat night, so leaving from mtl Sunday would be okay, then back and stay another night before going to sunton again on sunday ;)