So, over a weekend this fall, I thought I had run out of oil at the house (summer/winter hot water through the oil furnace.) The tank was on fumes, anyway... So I headed up to the boat, retrieved the Duckworks pump up shower, boiled water on the stove, filled the shower, and went and had a comfy shower in the bathtub. I was pleased with myself that I have enough camping stuff that I could have a warm shower even if the oil ran out, and the electricity went off, what with the Coleman white gas stove, or the single burner backpacking stove.
When I'm planning to sleep out on the lake, because it's fresh water, I save shower water by diving over to get wet, then soaping up in the cockpit, then rinsing off with the non-lake fresh water in the pump up shower. It's good fun, pretending to be on a self-sufficient cruise or something...