White Pass is awesome! Its worth the extra drive from Seattle in my opinion. No crowds, fun terrain, awesome tree runs (I've only just started venturing in the year but found some killer spots by following tracks. Actually yesterday found what has to be the most fun 'run' I've ever been on.
Kinda disappointed with the new terrain park. I liked where it used to be, kept the crowds away from that side of the mountain, but its cool that they're starting to have a legitimate park for those who are into that sort of thing.
edit - though if they moved the Yurt a bit so that you could watch the park that'd be pretty cool.