[Carl n Susan]

Over the years I have tried all kinds of ways to carry water. The bladder is the best way ever. When not being used it folds up into a small package which you can store anywhere. When you want to fill it, flop it open on the tailgate, and go for it.

If you are a boondocker who never unhooks and stays in one spot for weeks on end, then a large permanent tank is the way to carry extra water. But otherwise water is usually easy to find and you only have to carry it (and the associated weight) for a short time.