RV park of Portland
, Tualitan actually, is clean, reasonably priced and close enough to Portland to be non inconvenient (Does that make sense?)
My brother lived there in his travel trailer during a divorce and I worked for many years just up the road @ the Boones Ferry exit. I visited my brother there many times. I never felt it was creepy or seedy.
The next trip I do to PDX with my rig, I will stay there. (I lost my parking spot in someones driveway due to HIS divorce LOL!)
I have driven by the Sandy River one, it is also clean and a good location for gorge activities, but if you are going for the gorge, the state and forest service parks up the hiway are more in tune with the outdoor theme.
The Chicken and Dumpling place is called Tadds. It was my all time favorite eat out place when I lived up the hiway from it, and not because of location. I still travel out there almost every trip "Home" for a meal. Sometimes twice!