Because a number of people have asked:
CLEANLINESS-
We all know organization is important, esp. to find something vital in the heat of an emergency.
And while I am not at all convinced that cleanliness is in fact a path to religious salvation, it too can be a matter of safety as well as preference.
I have long carried a two-purpose external water pump: a) to replenish my potable water from a flowing stream or clear lake through high-quality filters into my on-board tanks; and b) to wash my vehicle when conditions and my determination to get somewhere have conspired to add a thick layer of mud to the sides and undercarriage.
This was "us" on the top of Keno Hill in the Yukon, a very remote place where I spent a week exploring multiple old mines on foot and motorcycle. Getting in and out of the vehicle was perilous due to the slippery mud on steps, and the mess would inevitably find its way inside the moment I opened a door or hatch - a dismal prospect.
Just behind me there were some pocket-puddles of fresh rain water.
And among my gear was the aforementioned pump, plus hoses and washing gear.
In less than 20 minutes "we" looked like this [and could have been even cleaner if I had chosen to use one of my brush heads in addition to the spray nozzle]:
A much safer and more pleasant home to work around and live in.
On many occasions I have used the external filter set I carry to replenish my potable tanks from running/clear water.
I had giardia once and fiercely do not want it again, so I am very happy to double-filter my water when it could be contaminated by wildlife.