When you're up in the PNW don't miss Astoria, Or, home of the "Goonies".
Lived up there 2 yrs and its got some interesting history along the Columbia River estuary. Nearby are several attractions, but not much in the way of free parking/camping. In Astoria you can stay at the Safeway grocery in the RV spaces...stayed 3 weeks last summer, moving around during the day. We have a few friends who offered space but the extreme grades on the hills and narrow streets kept us from accepting. Its like little San Frisco...even had cable cars first.
Weather nice a couple months and gray, cloudy, rainy the rest of the year. Very little snow, interesting place to visit with old world architecture. In summer, they have a great farmer's market in the downtown streets on Sundays.
While there, be sure to visit Ft. Clatsop, site of Lewis & Clark's camp.
Had a good time last June, weather was best I've seen, but don't wanna live there again.