And my anecdote as a scout was exactly opposite: we were trained to not drink from a natural water source except as a very last resort, and then, to prefer movi

And my anecdote as a scout was exactly opposite: we were trained to not drink from a natural water source except as a very last resort, and then, to prefer moving water over stagnant water. But as the motto says, you were supposed to Be Prepared, and that included bringing water.