We recently "camped" in Kanaskat-Palmer State Park, a few miles nearer the Cascade foothills than our home is. While there, we saw that a pair of their yurts was grouped at the end of a long, double-wide, RV place. We inquired, and were told that we might be able to have two trailers on the gravel _and_ two non-RVing, ordinarily-tenting, friends occupying the yurts.
Such an arrangement could make for a nice outing.
Pix of the yurts:
<https://goo.gl/photos/UJxgbJMfxpymiDFT8>
Mark_