Depending upon the type of catastrophic event, it might make sense to stay mobile, but in most cases having ample food, supplies, water, and shelter will be preferable to a rugged life on the barren road. This is why thousands of people are spending a good portion of their income into stockpiles of food, ammunition, and supplies.
I’ve long been an enthusiast of simple living and survivalism – see our sister blog www.blogtosurvive.com, and last year I purchased 5 acres at the base of a mountain range in Western Montana. This area is conducive to the survivalist lifestyle, as are most areas 4-6+ hours outside of a large metropolitan area. They provide clean, fresh, water sources, ample land for planting, wooded areas for materials, and wildlife for hunting. The general scarcity of people is also a plus for someone looking to survive in a catastrophic situation.