Unless something has changed very recently, you pay Oregon income tax if you live here or work here. To avoid it altogether you would have to both live and work in Vancouver.
(until 5 years ago I lived in Portland and worked in Vancouver)
Seems like im wrong. However this puts oregon in a minority of states i believe. Most states do not tax residents on income earned in another state though they certainly could
(until 5 years ago I lived in Portland and worked in Vancouver)