Visited there in August
Flew to Seattle, rented a car and stayed 9 nights. Visited Mt Rainier NP and Downtown Seattle (3), Olympic NP (2), Northern Cascade NP (2) and then Vancouver (2).
Check following for details
http://www.nps.gov/parks.html
I like Olympic the best among three national parks, especially the pacific coast and the rain forest. Vancouver is a very beautiful city too. The suspended bridge park was very interesting.
