The advice that I've personally been given, from both 2 LEO's, in addition to the instructor of my gun safety course, is this: If you get pulled over, when you hand over your license and registration, with both hands on the wheel, inform the officer, :"Just to let you know, I am legally armed. How would you like me to proceed?"
If you are armed, and you do not inform him, your LTC will pop up when he runs your info, and it's up to him whether he comes back with his gun drawn and orders you out of the car or if he just asks you for your LTC. Either way, I was advised to inform the officer before he finds out himself.
Obviously, none of the people who gave me this advice, nor myself, are lawyers, but it's advice I plan on following, unless I hear of a good reason not to.
The USCCA has an article about this subject, but I'm not yet a member, so I don't have access to it.
Has anyone read the article I'm talking about?