Washington is a state where notification is not required. Our CPL information may be returned when our name and driver's license is checked during a stop. I used to speed quite a bit and have been stopped 4 times while carrying a firearm. I never mentioned my CPL or my gun, neither has any LEO, we both got the stop over politely and professionally in the minimum amount of time required, no muss, no fuss, two tickets and two warnings.
The safest place for my gun is secure in it's holster with nobody touching it. The best chance I have of the firearm remaining safe in it's holster is to keep my mouth shut about it. Informing the police officer when not required accomplishes one thing and one thing only - it invites the police officer to needlessly handle my gun, placing everyone within range in more danger from a negligent discharge than if the gun stayed in the holster. I simply will not put myself, the officer, and others in more danger in order to prove my "good guy" status to them at the beginning of a traffic stop.
If the officer has a concern about a firearm, all he has to do is ask. Since I have never, ever been asked about any firearms during a traffic stop it doesn't seem to be that big of a concern, so why should I rasise the concern, unless I have to by law. Once the officer returns to his vehicle and calls in my name, address and date of birth and finds out that I have a VALID CPL and driver's license - he now has ZERO legitimate reason to ask/be concerned about a firearm if he wasn't before. Now, at this point, if he returns and asks me about a gun, and seizes the gun "for officer safety" it is now a 4th amendment violation. If I tell him about my gun and CPL at the start of the stop, he has every right to take my gun from me "for officer safety" because he has no idea if my CPL is valid or not until he checks it through the state.
BTW, this argument is brought up about twice a month on this forum. But, what the heck, the same people with the same opinions will post the same things. Can we talk about open carry now?