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