So my girlfriend and I want to do a little roadtrip this upcoming summer to some of the national parks in Washington state and Vancouver. I'm having a little trouble planning out a route. We want to hit up Vancouver BC, Olympic NP, Seattle, Mt.Rainer, and North Cascades NP. We'd be flying in from Chicago. Where would it be best to fly into? Seattle or Vancouver? As for the rest, what would be the best route/most senic highways to take?