That's a good cause. I don't have running water either, and I do manage to make a my water jugs go a long way. You have to be thoughtful about every drop, which isn't a bad thing.
We really do take clean running water for granted. Studies show that the typical American uses 250 gallons a day. A day!
Such riches.
Anyway, I have four 55 gallon rainwater drums and it's time for me to get my 5th.