I've never been to Jay Peak, but what about returning south to I-89 by Montpelier? There is a new Supercharger at Berlin, VT as well as 50 miles further south on I-89 at West Lebanon.
Yeah that's the best option, but even if you range charge there you will likely still need charging while at Jay Peak. Especially for 3 days. Let's say 5-7 miles per day vampire, plus 10-15 miles cost of cold-startup per day, plus any in-town driving. Cutting it pretty close or just not making it.