When we camp - or I'm preparing food track side for my husband and pit crew on race weekends, I always bring 2 coolers. 1 cooler is for beverages and sits where everyone has access to it and can help themselves. The other cooler is for the food - and I keep it a little out of the way so that everyone isn't opening it all day - letting the cold air out etc. Secondly - if it is going to be more than one day - I freeze everything, and that helps keep it fresh. I buy ice every day, - to top off the cooler, and I keep re-usable freezer blocks on top of it all just inside the lid - that helps make it last. I have it down to such a science that usually when I'm buying ice, 1 bag will top off both coolers. I have the colman extreme coolers - they say that they keep food cold for like 5 days. The first two years that I had them they absolutely did - we hardly had to add ice at all. I think the insulation material inside breaks down though - because it does seem now that I have to add ice at the end of day 2, 3, etc...
The last time that I had to cook @ the track for 4 days - I prepared pasta at home, drained it, tossed it with oil, put it in gallon size zip lock bag and froze it flat. @ the track, I put frozen shrimp in a pan on the camp stove, tossed in some frozen veggies and scampi sauce, and then tossed the pasta in at the end to warm it. I had already wrapped garlic bread slices individually in foil and they warmed on the little mini grill - everyone RAVED about it, and I had people from all over the paddock area trying to trade sandwiches and hotdogs for shrimp scampi & pasta! Recently while camping for my husband's birthday - I made his favorite meal during the week, and froze the extra to take on the weekend. Basically - it's a sloppy joe recipe that I make with cooked shredded chicken. Again - freeze it flat in gallon size zip lock bags. At the camp site - warm it in a pan on the camp stove, serve it up on buns with a side of chips or raw veggies like carrots, etc. and YUMMO. For dinner - I packed frozen chicken fillets, and whole red potatoes, and mini carrots. I cut the chicken, & potatoes up, and put them in a gallon zip lock back with the carrots and a little onion. Sprinkled the dry lipton onion/herb soup mix in, mushed the bag around a little to mix it through, and then dumped it into disposable aluminum pie pans, wrapped them in foil and put them on the mini grill. Every so often I shook it a little and after maybe a half hour - we had a great meal.I also had corn on the cob individually wrapped in foil and they were on the top rack of the mini grill and everything cooked perfectly! My dad joined us to celebrate my husband's birthday and couldn't believe how yummy everything was, and how much there was considering that we were camping. If you pack everything in the gallon zip lock bags and freeze it flat, you can stand them up in the food cooler like files and fill it with ice around it, they don't take up much room, it's easy to pull what you need out without having to dig around and there is no leakage of water into the packaging! My doing it like this, I only had 1 pan and cooking utensil to wash - everything else was disposable. Also - it's a little more expensive, but I buy single serve milk containers - because they pack well and then I don't have to have glasses/cups to serve it in wash or dispose of. Breakfast - granola bars, cereal, donuts, and/or cinnamon rolls. You can even get those little pecan pinweels in the little aluminum pan - take the package off, and then warm them in the pan on the grill and they are super yummy. Good luck & have fun! Alo - I found it convenient to have a big rubbermaid tote that I had the bread, chips, utensils, paper goods, etc in - I could keep it in the car or tent, everything stayed clean and fresh.