I just googled Hummingbird bander in WA and didn't get a specific one for hummers but found this guys name as a bander for birds in WA. He is in the Spokane area - maybe he can put you in touch with someone near you. Try this one danielfroehlich@gmail.com

I will also email one of the banders who come our way, I am sure one of them might know someone out your way.

One of the banders I know said to contact ngbatch@yahoo.com

They used to live in Spokane but just moved last month. Theys hould be able to give you a name of someone.