SteveAE wrote:
Sign Man,
I carry a spare water pump that has a length of heavy double conductor wire with a couple alligator clips on the end that I can clip onto my battery. Then I have adapters that converts the male pipe threads (of the pump) to standard hose threads. This allows a longer hose to reach the water source (be it a container that I don't feel like lifting, a bucket, or even a stream/pond) and a shorter hose to feed into the RV. As Brian said, you need to be cautious of the source, but this works well (but not fast), as long as the head height (distance you are lifting the water) isn't very great. It also gives you a spare water pump to-boot. Hope this helps.
Steve
I too carry a spare water pump and use if for transferring water I carry in on my motorcycle or other sources. It also follows my rule of redundancy of having backup for equipment I use to live off the grid/boondocking. As well as the rule of having more than one use to be brought along. You will notice is is mounted to allow a surface to work off of, as well as long (35 ft) power cord to click onto various battery banks that I have.

But, I would/will
never use this pump to transfer water from a stream and or pond. I don't want "pond water" going through an important pump like this. I had plans on going the route you are considering, but elected not to because of the reasons I have described. Sometimes the simple way of doing things are the easiest. But it does look cooler to write on the face of my iPhone app for notes, than my hand or a piece of paper. My tanks are already contaminated from a well (Cousin's property that I attached to the wrong spigot to pump from)that I will be forever filtering flakes from my potable water system. Or at least until I change out the tank. For me, it is easier to just use my bucket/s. It is not like I am washing my truck and or camper with water pumped from the river/stream/lake. That is what I do during rain storms! Seriously.
Good question and topic to discuss. Thanks for bringing this up again.