I5 corridor: You could make a stop in Corvallis Oregon. . .home of OSU; an interesting mix of tech & granola. (a very liberal place, you'll like that
McMinville OR is not too far off, and has some interesting stops. The SpruceGoose at the Museum of Flight . . Emory's place (Wild-ass Porsches) is there too.
From Portland up; you could detour off to Mt StHelens. . . for something rare.
When abouts are you going to be in Seattle?
I'd be glad to buy ya a beer if the timing works out.