There isn't a whole lot of the mountain open so just check out every run. The Phat Italian is the dope sandwich spot/ gulf gas station that all the cool kids stop at after skiing. Kent Pond in the ill nature location for eating the sandwich you bought. Hike up into the woods there (you'll see a path) for waterfall viewing and a nice location to smoke if you so desire.
Check this out the day you go: http://www.killington.com/site/mountain/conditions
Here is a e-coupon to get 2for1 pricing: http://www.killington.com/site/2for1/2for1-online_display
Hermione was going skiing with her parents, something that greatly amused Ron, who had never before heard of Muggles strapping narrow strips of wood to their feet to slide down mountains.