I try to keep about half a gallon of water on me, but like I said, I've been forced to stay more to urban areas where I can usually find a water source within a half mile. Half a gallon is probably overkill for me, but I expect I'm gonna need more than that when I drop off some of my stuff and start spending more and more time in rural places. I'm finding carbs and protein are best for the wieght. Peanut butter, graham crackers, granola bars. Price is a huge factor for me. Lots of living off of dollar menu items at fast food, and even more ramen noodles. I do smoke. If I come across some money and can afford name brand cigarettes at all, I usually stick to cheap ones. L&M's. Slowly, I'm learning to leave out camels, Marlboro, newports (all top priced smokes, etc...) altogether. I'm actually considering dropping filtered smokes altogether. Just roll em ya know. Wayyy cheaper