Packaged stuff so your food won't get dirty and stale. They make for good snacks. Water is obvious and you can cook canned veggies over a fire. Trail mix, peanut butter, bread, and biscuits are all good choices too.
Also, a good idea that I use is this...
Take a gallon jug and a a golf tee with you. You can stick the tee in the jug close-ish to the bottom and fill it with water. Then take out the tee to let the water flow so you can use it to wash your hands and replace the tee when you are done. It saves the time you would use to walk to the restroom. set it on a table with soap close by.
