If a Elks member there are Lodges closer to Cedar Hills which is close to Beaverton. There is a new state park off hwy 26 don't know the name.
Mobile Home Coral ( Mobile Home & RV Spaces ) 503-671-0676
3737 SW 117 Ave Beaverton OR 97005
When my parents lived in assisted living in Beaverton we found this place. It is mainly a mobile home park that has some vacant spaces they rent to rvers. It worked for us we have not been back since parents pass away in 2009. Found the neighbors pleasant, were able to get mail delivered to our spaces mailbox. Not sure if they take reservations, you may just want to drive by and check it out. Regards Dick