For a Washington fishing Guide trips you will need an Washington state license. You can purchase it here. https://fishhunt.dfw.wa.gov/

To see the Washington state licensing fees you can find them here. https://fishhunt.dfw.wa.gov/wdfw/licenses_fees.html

For current Washington state fishing rules and changes you will find them here. https://fortress.wa.gov/dfw/erules/efishrules/rules_all_freshwater.j