Thinking your paranoid is pretty subjective. There are areas here in Oregon I don't go out to without a long gun in the truck. I have thought about designing and installing a truck safe not just for regular carrying of a long gun, but it would also be nice for when I am traveling to hunting destinations.
F450 Cowboy and I once talked about it. I am waiting until I purchase a crew cab before I design it. The Sherrif's dept. I used to be with had some for their suv's to secure class 3 and specialty weapons/munitions. They were pretty nice.