Most trips over 4 hours in length and any that crosses over typical lunch period should have a lunch stop. Paddlers need extra calories to perform at peak efficientcy. Many persons, especially children have quick metabolisms that need to be replenished. In colder weather, high energy foods can help avoid hypothermia as well. Schedule frequent water breaks whether you plan a lunch break or not. Many river lunch breaks can be a simple affair, more of a high energy snack break than a large lunch. Make certain food and snacks are packed in suitable waterproof containers and secured well in their boats. Hard fruit, dried fruit, trail mix, energy bars, and sometimes chocolate (chill ahead of time) work well. All of these foods can get wet and still be quite edible. Make certain everyone has at least 20 ounces of water, Gatorade, or other suitable drink. I also like to tuck an extra small plastic bottle of water in the back of my boat in case someone runs out.