I would have to disagree with the folks saying to live in a coastal area in Florida. In a hypothetical collapse, you would lose weather forecasting, and hurricanes are really no fun at all, especially in a vehicle.
I think everyone gets just a little too excited about this, though. We have had rough times in the U.S. before, and we didn't go full Road Warrior or Walking Dead. Having food, water and a way to purify more, and plenty of fuel to reach family or friends are always good ideas, especially if you live in a remote area in case of vehicle breakdown.
Preparing for natural disasters like hurricanes, earthquakes, wildfires and floods makes more sense to me, since they are much more likely.
I have been in and worked hurricanes and tornado disaster areas a few times, and the people were for the most part very good to each other. There were a few dirtbags taking advantage, but mostly people helped each other and worked together to get through it.