Trip planning - Pac NW

[wordplay]

We're busy with planning our CA/OR/WA/BC trip for next month and I need to know: are there any experts on that corner of the continent reading this? I have questions like: "Aquarium: Seattle or Vancouver?" and "Hiking, pick two: Redwood National Park, Columbia River Gorge, Olympic National Park" and for a part of the world that is as wired in as that is, the internet is not really my friend here. Anybody have ideas on where to go to get this info?