If you're not interested in the World Cup, and I'm not, you should ski anywhere but Killington next weekend.
If you are interested in the World Cup, then by all means go, and get in on the action, but expect it to be very crowded and do not plan on doing much skiing.
Keep in mind that all the parking at K1 will be blocked off, so unless they open Ramshead (which is unlikely as they're not even top to bottom yet) you will have to take the shuttle bus with thousands of WC spectators to get to KBL. Also, all the hotels will be filled with the race teams, media, etc, so you have to either have a house in the area or do a day trip.
I've lived in New York my entire life.