Replying to Legit Camping at Ski Area Thread

Pretty much riding off the VT guy (below), but wondering if anybody has found solid place that allow legal camping - hopefully in parking lots - at ski areas. I know there are one or two in WA, but if anybody can pass any info along I'd appreciate. Ideally it would be in the West - Idaho, Washington, Montana, Oregon? I have a smaller RV and would love to spend a week "somewhere else" doing something different.

Thanks.