[–] fortuitouslyunfallen 0 points 1 points (+1|-0) ago 

A gallon a day of water? Is that including water for washing?

[–] Titus-of-Voat 0 points 1 points (+1|-0) ago 

If this is a three day list you don't really need a whole lot of water for washing, especially if you have wipes.

[–] Nadesh [S] 0 points 1 points (+1|-0) ago 

Hand washing undergarments will do, the rest will have to wait as long as possible or until a larger water source can be found or you manage to recycle the water that you have.