Less spoiled than any other major resort in the east.
If you want to party, bring your own.
The valley, including Mad River Glen and Sugarbush, offers the best and most complete ski experience in the east. Sugarbush offers everything from well groomed trails for skiers who want to cruise to classic eastern steeps, glades and natural terrain. The trails, local roads (no traffic lights) and villages (there are two) are uncrowded and charming. The owner is a local and his care for the place is plain to see . . . you can find him directing traffic in the parking lot or on lift lines. Lift lines are non-existent on weekdays and modest on weekends.
Mad River Glen significantly adds to the valley. It's a must unless you're either boarder or just starting out. Ski it on a weekday though as the weekend lines tend to be long.