One more point to consider is a low profile: If you're driving around in a vehicle that looks like it's been stolen from the set of a Mad Max movie, with tools and cargo strapped all over it, don't you think other people would be interested in the provisions you clearly have? And what are desperate people going to do to your vehicle if it's stuck in traffic, or if the road has been blocked or destroyed? Play your cards a little closer to the chest than that, especially when lives are on the line. Consider driving something that looks like a work vehicle or a soccer mom shuttle. You could still have all the cool post-apocalypse supplies you want, but this way you're not advertising it to the panicked masses.