Could you get a backpack with an outside pocket that would let you conceal the pistol from view but have it available for immediate use? At least so you wouldn't have to digging around in the pack to find it. Still a compromise from having it on your person but given your restrictions and criteria it might be a worthwhile solution.
Jim,
Good thought, and actually the backpack I carry has a small outside pocket that carries nothing but the aforementioned kit, already on it. There will be no searching if I had to grab for it.
thanks,
68W
