Yeah.
Don't inform verbally, unless your State has no permit, if it does you hand them your drivers licence with your permit behind it.
Don't freak them out anymore than you have to.
Plenty of stories out there of some cops being a littler over zealous and ruining your day, not by shooting you just by running you through mill and keeping you on the side of the road for a spell.
And whatever you do if they ask to see it, tell them where it is and what you are about to do, as in "it's in my glove box and I'll open it to get it for you or it's on my persons etc."
Do Not Make Any Sudden Movements.
I realize you probably know all this, but the game has changed out here. Especially in the larger cities. My town would be considered small compared to some around the country and yet I have seen our cops pull ma&pa over for a traffic citation approaching with hand on gun.
Of course my town is 3/4 low-lives.
When the Chief issued me my permit, I made it a point to inform few of the finest and to spread the word, I was told not to worry we know everyone in this city who has a permit because it's less than 20. (and we know were you live and what you look like)