Cool trip.
I love my Msr dromedary bags, they are tough. Only complaint is that they are a bit hard to unscrew the main lid after a day or so. I usualy just fill throught the smaller cap though, and use the larger for cleaning. I prefer several smaller bags for weight distribution, and if one is destroyed(it happened, nothing cool, just a sharp rock), I have three more water containers. Also, I have the sippy hose attatchment that I transfer from bag to bag as needed, and it can work as a shower as well. leave one in the sun for a few hours, hot to warmish water. I can also use the hose to fill directly from my msr microworks filter.