100 oz (3.1L) Camelbak with Water
Stripped down IMP's (dinner type usually).
If it's extended game, I usually have to replenish the camelback wherever there's water (or I'll bring extra water to do so if it's not available on site). Food is simple enough with the IMP's so I stay fed, watered and happy
IMP's aren't great for you, but they do a helluva job at being portable and "edible" plus they have a ton of calories for what you are going to be burning that day.