Sig line says "Ephrata, WA."
Wa state has winter passes. $75.00 for winter and $10 buck a night if you want elec, last I've checked out. Good deal if you are Wa resident or maybe senior? Be sure to look up what park first because some of them close during winter.
Probably have to time the pass weather wise. We got one couple years ago, good deal money wise but got tired of rain on roof 24/7. And over your way, we don't like the cold. Go further for sunny warm weather, Yuma is only 24 hours away driving.
http://parks.state.wa.us/205/Passes