I haven't decided the route yet, I'm gonna do some map planning before I leave Bend this morning butat the moment I'm leaning towards going up to see the west side of St. Helens. Where after that is wherever the road takes me.
FWIW, if you can get past the insanely arranged street layout this is one hell of a place for a beer tour. At last count I did 16 [I think] breweries in a day and a half - all on foot.
I haven't been down there in 10 years or so. I need to do that.
It sounds like you may get into the Yakima area. If you do, definitely stop at Bale Breaker Brewing which is just a mile off of Hwy 82. Downtown Yakima is the Yakima Craft tap room (which serves a decent dinner), and just off of Yakima Ave is Hop Nation Brewing and Berchman's Brewery taproom. Bale Breaker is not within walking distance of downtown but the others are right there.
If you do end up in Yakima, PM me in advance for my phone number and I will meet with you for a pint if I can! Love to meet people from the forum. Also if you are interested I can organize a tour of the BSG hop pelletizing facility as well. I am there for a couple of days training the new lab tech.