This service is something everyone south of NYP misses, as getting to Canada from points south of NYP requires either an overnight stay in NYC or points north, or spending some quality time in NYP in the deadest part of the night.I think you'd really have to do WAS-MTR to make it worthwhile.
I went to school in VT's Northeast Kingdom for a year a while ago.. At that time the Quebecois went to Stowe in fairly large numbers, not sure if they still do, but IMHO it would not be very practical for them to take the train to any place in VT for skiing other than Waterbury, then getting a shuttle to Stowe, etc., but that would be too indirect and take too much time vs. driving.I don't think there's a huge ski crowd from MTR. Jay Peak is very popular with Canadians and St Albans is the closest stop to there. But they'd just as soon take a day trip into St Albans. It's still quite a haul from St Albans.