Yes. Well pumped water into a HUGE tank elsewhere on the property. A portion of that water was periodically pumped into a smaller holding tank near the trailer, just a bit uphill from it so there was some naturally-occurring water pressure.
Somebody had to manually open the valves for a while, once a month or so, to refill the smaller holding tank. The procedure was to fill it until it overflows a little bit, so all the pond scum floating on top of the water runs off.
Water with pond scum tastes a hella lot better than city water full of chlorine.
(ETA: PS: If you liked that trailer picture, there’s about 6 more views of it there too, at: Index of /pictures )