(except the lifts suck) but the longest i waited in line all day was 5-8min on a saturday POW day, and the locals said it was the busiest theyd seen it in 2 years.
I've never heard of Silverwood are you thinking of Silverton.
But I would say ski areas worth skiing under the radar: Loveland, Monarch, Purgatory, Wolf Creek, Silverton. Very debatable if the last two are under the radar.