As a callow youth, I bushwalked the Southern Alps from Murray's Gorge in Victoria to Mount Kosciuszko, the highest point in Australia. My companions were Bob Jones & Bill Zytnik. We weren't even sure we could even survive at lofty elevations of 7000'.
The Alps, are of course, the backbone of the continent, so you would think you would need to carry a lot of water. In fact, the rolling terrain was mostly hummocks of some kind of grass.
We were told that we didn't need to carry a lot of water, just a plastic tube. As we all worked in a research laboratory, we had plenty to choose from.
So here's how it worked. In the sides of the grassy hummocks you would find a myriad of holes. These were the burrows of yabbies (freshwater shrimp). So you just stuck the tube in & sucked. Water! Sometimes a shrimp. As we jumped from hummock to hummock, sometimes our impact would eject a yabbie right out of it's burrow.
All of this happened before algore invented the Internet - so I can't find any references. But it really happened.
