I am always amused by those discussions on how much to carry above Trail Camp on Mt. Whitney--3, 4, or more liters. Up through at least July, using this technique, I can go to the summit and arrive back down at Trail Camp still with water in my single canteen.
I can attest to the success of this method (refill as you go), having tried it with Bob (of course the key ingredient is knowing where your water sources are, predictably)
Not meaning to change the topic, but the difference between 8-12 extra pounds VS a canteen can be a game changer.
