I thought about that, but there's the 10 round limit of the magazine. Would have to buy a special mag for that. And...dunno if carrying would make a good first impression with the customers I'd be meeting.
Then I'd have to research the laws for the other two states.
California is not a traditional open carry state. Open carry is generally prohibited except in unincorporated areas where the county has not made open carry illegal, or, pursuant to a CA open carry permit issued and valid only in a county with a population of less than 200,000 persons.
WA is concealed only, not sure about OR. You can get a Utah CHL for carry in WA.