I hate to criticize but this is a great learning opportunity. If only more people would pay attention. I've already heard someone write this off to the couple being "old people".

Growing up, my parents and grsndparents always advocated that we travel to "survive not arrive." Any number of things can happen between point A and point B. Especially on a long trip in unfamiliar remote territory, it would seem prudent to take extra supplies. Unfortunately, many people don't get very deep into their "What's the worst that could happen?" thinking.