Arlington KAWO
Mark & Karen Thompson own quite a few hangars for rent (360)652-7530. They know the RV crowd, and there are about a dozen or more RVs on the field. Call now and let them know you're bringing an RV. Sometimes there's a waiting list, sometimes there's not.
You can also ask them for Vic's number. He rents out hangars at Arlington too. Sorry, I don't have his number. You can also contact the airport office to get other hangar rent/lease options at (360)403-3470.
Good luck!