Hi Lucas, this is challenging indeed! We decided to buy a small "car-fridge" to reduce/avoid buying bagged ice. It is plugged in the car, so every-time the car motor is on, the car fridge cools down. Another trick is to freeze big bottles of water prior to the camping trip so that you can use it as ice in the first part of the trip (really big bottles can take up to several days to melt completely), and as water to drink in the second part of your trip. Just be careful because non-plastic bottles are more tricky to freeze without damaging them because of the water volume increase. Our last trick is to limit food that requires to be maintain at a low temperature. For instance we bring more bread or cereals and less yogurt or ham. I hope this helps!
