I have been pulld over with my gear before and you must disclose you have your weapons in the car. They were very interested in the guns and gear and wanted to look at and play with them (which i asked them to not pull them out). you must remeber these things look like real guns and your average person cannot tell the difference, the police are no different. And just think if you do not disclose you have them and hes walking back to his car and sees a gun case in the back his first thought isint going to be oh its empty or oh its fake, its hmm whats he hiding in the gun case he didnt tell me about.
I have been stopped and approached by police while there weapons were drawn and trained towards me, was stressful and not very much fun. Why take a chance, just be honest and open with them.