Welcome to the RTA Forum!

2 weeks should really give you ample time to explore the areas you want to visit. I think it will really set you up for a great trip. I unfortuantly, haven't traveled very much in this area, however, there are quite a few posts about the Northwest on the Forum. I'd suggest typing some of the places you want to visit into the forum's search feature, and see what you come up with.

One more question, is this going to be a round trip, or is it just one way? A round trip might actually work better for you. You could spend your time following the coast one direction, and visit your inland destinations when you travel the other way. It would also be cheaper, both for your flight and for your rental car.