Re: BOB or GHB
I keep tools, first aid stuff, roadside flares/fuses, space blanket and food/water in all my rigs. Water is a no brainer but doubles as a backup coolant should you have coolant system problems.
without water, you are relying on someone to come by and help you if you get stuck good for whatever reason; wreck, out of fuel, stuck, engine failure, etc... I don't want to rely on someone else for drinking water, so at a minimum I would keep a gallon or two of distilled water in your car.
A weapon is always on me, I tend to throw a long gun in the family SUV if we're going anywhere also.
"Loud noises don't end gunfights.... well placed shots do."