I vote for a 38 revolver. Less complexity than a semi auto pistol - no worrying about whether there is one in the chamber, or trying to rack that slide. No take down (and put back together) for cleaning.

Stainless would be nice if it is sitting around and not used much, and it has a nice heft to it. If you are a smaller person though, and want to carry it, the stainless can get really heavy.

Get a Washington state cc permit. They are ridiculously easy to get. No class is required, just fill out the form and give them money. It will also work in neighboring states. Might also be good to get one before they tighten up as the news has been indicating.