Thanks Steve C! It never occurred to me to use snow as drinking water!
Although I'll be going in the first week of August - there probably (hopefully!?) won't be any snow left by then??
On the WAG bags - I don't think education is the problem. If someone is inconsiderate enough to leave a bag of poop on the trail, they know full well what they're doing.
The way I see it - you should leave the trail how you would want to find it. How would they like it if they had to walk past other people's poo??