driven through Portland, never really stopped or stayed. I'm wondering if they have a tourism website where you can find some of this info? Driving along the Oregon Coast is beautiful & there are lots of places to stay but during the summer months, it's very busy so places may be already be booked. Several years ago we were driving through on the way back from California & every place had a 'no vacancy sign', so if you want to stay you should probably get on it.
Sorry I couldn't be more helpful.