East Coast and Summit County aren't really skiing in my opinion. You are kind of an idiot if you pick a school because of proximity to those lame ass mountains. Sure if its the best you get into go for it though but both places suck to ski.
Whatever the best school in British Columbia is probably it if its close to Whistler or interior BC mountains but I know nothing about Canadian schools.
Nevada-Reno is probably the best in the USA (BYU is equally good but the honor code is a deal breaker to most people who drink or smoke.) UU and Montana St are fine but IDK if you want to go there instead of somewhere better just for skiing.
Maybe go to a good school and try to do a semester or year abroad at a school in the alps?