My question is, if I have a lifestraw and container, will I need to worry about packing in water for a trip to the top of Whitney? I'm 440 lbs, and training, but I imagine this taking 3+ days, and packing that much water is too much. (I've ran 3 marathons, and completed 3 major swims at 400+ pounds, only for the doubters). I'm going up Whitney beginning Oct 18th. THANKS in advance.