As soon as the officer checks your ID & license (on his computer), the fact that you have a CCW is going to show up.  You're much better off, as I was taught in the class I took, informing the officer, immediately, that you have a CCW and you are carrying.  (After all, what's the point of having a CCW if you're not going to carry -- ALL THE TIME?)  The last time I got stopped, the officer actually thanked me for being one of the good guys who, presumably, would have an officer's back, rather than be out to shoot him.