[dirtboy]

1 gallon is basically bare minimum. Hydration, brushing teeth, sponge bath every couple of days. Maybe a bit for cooking rice but not pasta. In colder weather you don’t need as much since you are not sweating out as much.

[JRandomFreeper]

Actually, my mountain man experience had me using more water in the winter than in the summer. That was real-world kind of stuff. And for over a year.

3 days, maybe you could get by with a gallon a day. It takes that long to dehydrate to death (on average) without any water.

Having lived the real deal, I keep 60 gallons minimum on hand in the house for my first 3 days. I can do it on 5 a day. It sucks. Hard.

/johnny