I've totally thought about this. I bought one of those 12 volt Coleman coolers a while back, and we drive so I could totally do this,plug it in in my hotel room with the converter kit and bring in stuff to eat. We always make up a batch of beef jerky for both the car rides and the parks as it travels well,and well it's tasty. The only big snack I eat in the park is a Dole whip(s)