While it may not be required , I'm sure it would be greatly appreciated by the officer. Might even mean the difference between a warning , and a ticket.

I've often noticed the next question after "license , registration and proof of insurance , please?" is "are you carrying and drugs or guns?"

I always hand over my LTCF along with my D/L reg & ins cards when I'm carrying and inform the officer that I'm carrying legal.

Most cops seem to be put at ease by yer honesty.
Others seem to go into tactical mode.