Due to 4 lil ones, I don't get to do to many all day sits but the few a do. I usually try to eat a good breakfast before I go out that way I can just bring snacky foods...protein bars, beef jerky, trail mix, etc. Oh yeah and I also sometimes bring some MRE's, they don't all taste very good but they are good cuz they don't contain a ton of food but contain all the calories needed to get you through the day.