Buy vehicles that will blend in day-to-day, but that will be eminently practical WTSHTF. Say, for example, a crew cab 4WD  pickup with range tanks, towing package, and a camper shell. Select one with both the body and camper shell in flat earth tone colors–like a forest green body with a tan shell. Do not get a vehicle in a camouflage paint scheme. That will instantly brand you as the local whacko. Stock up on some cans of flat brown, green, and black paint to use to paint over the chrome trim, but only do so after the balloon goes up. Buy a military surplus camouflage net and support system for each vehicle. Why? Read my novel Patriots  and it will be abundantly clear.