Not a huge deal, but possibly worth noting: My Dromedary bags actually don't hold their stated capacities of water. I've always thought that my Dromedary bags 'just didn't look big enough' for their stated capacities. I just spent a few minutes with a 1 L measuring cup and my Dromedary bags. (I have a bit of a collection, since the 10L bag won't fit through some of my day hatches.) The bags were 'filled to the brim' under the tap, holding them vertically. Results (which were roughly confirmed by weight using a bathroom scale) Actual capacity of 4L Dromedary = 3.6L Actual capacity of 6L Dromedary = 5L Actual capacity of 10L Dromedary = 7.5L So, something to factor into your calculations if there's not a lot of water along your route (which I'd guess applies to a lot of places right now). BTW, I'd be happy to find I was mistaken, so please repeat this 'check' if you own Dromedary bags.