Wife and I did a similar trip a few yers ago. A week is NOT enough. It'd be like taking ONE spoonful of bread pudding. We flew into Seattle ,ferried to Vancouver and back, and then drove South from Seattle along 101 and 1 to California and Santa Barbera. I had planned to fish but abandonded that idea in favor of sightseeing. Mount St. Helens and Mount Rainier are not to be missed. The views are intoxicating. We had a book "Eat Your Way Across the US" by the Stearns and that put us into some memorable restaurants, diners and dives.
You WILL enjoy your vacation, GUARANTEED.

Mark

PS: Can anyone from thataaways tell me the name of a restaurant/ buffet/ abandoned loggers dining/mess hall on the waterfront either in WA or OR serving , among other great things, a WHOLE pie for every two people in your party. We're hardly talkin gooormay BUT you ain't leavin hungry.