You're not asking the right question.
The question you should be asking is, "What have courts ruled?" and they have ruled that it is reasonable that a LEO disarm you for "officer safety" if he wants to, ask you to exit your vehicle, etc. I think it's totalbut it is what it is.
Just a hypothetical, but I've been curious about this. What is the procedure for dealing with a traffic stop when you have LTCH & have gun in car, or on your person? I was told at a gun class you shouldn't have your LTCH in view to your driver license. This could cause a standard stop to be escalated if they see you have a permit. Do you wait to say anything until asked? I'm guessing you would want to tell the cop there is a gun in the glove box before opening it to remove registration....
I definitely display the license and announce the location.
The best way to avoid this is to not do things to get pulled over in the first place.