Where do I move?

So for my junior year, my parents said we can move to a mountain out west. No this isn't because I'm rich and spoiled but because my whole family loves to ski, and my alllergies are awful out here in the east. every other tree or grass makes me die of sneezing. SO, I need some advice, where to? deepest snow, mellow back country, and a pretty good park. but back country are powder is the priority. also chill locals helps as well.