I'll also answer the question fully...It is a valid question even if asked in a particularly insulting manner:What's your plan when these things happen when it's below freezing. You don't seem very mechanically adept. Find a room somewhere and be safe
I don't give a flying rats ass if the water fails in the middle of winter. Indoor running water is a modern luxury, nothing more. I can get water at the local on site dry sump well, the gas station, McDonald's, Walmart - whatever. I want to get it working because I don't want to freeze my rear end off dragging one bucket at a time up from the well, but if that's what it takes, that's what it takes. The plan is to get heated hoses to fill the onboard tank from the well, but that's a luxury, not a necessity. There's an on-site porta potty if the black tank refuses to drain for some reason (although, as mentioned, I plan on putting heating pads on it). Still, there is a backup plan for pooping. My mother grew up in rural Kentucky using a creek as a water source before they finally upgraded to a well (without indoor plumbing). Grandparents didn't get indoor plumbing until I was around 7 from what I've been told, when I was little they would fill up buckets from the well and heat them on a coal-fired stove for baths. My mother has been an excellent source of methods to live without indoor plumbing if necessary. My aunt grew up the same way, in a city not too far from here in Wisconsin, but her family had a fancy indoor hand pump well. As my mother and aunt have both mentioned, if the water totally fails, as long as you have a stove, you have hot water.
I have indoor-safe propane heaters in case the furnace goes out.
If the power goes out, I have a generator.
If the generator fails to start when the power goes out, I know I can plug the 7 way into the trailer hitch and the furnace will kick on (I tested this earlier to be sure), and of course I still have the indoor safe propane heater.
I've even got a spare regulator and spare hoses for the propane tanks. Despite being semi-permanently parked and getting a 100 pound propane tank, I have kept the dual-tank auto changeover regulator so I can get a propane tank from one of the local gas stations or grocery stores if the big tank can't be refilled for some reason. In fact, I keep a full 20# tank attached even with the 100# tank just in case.
I'm *far* more concerned about heating and power than water. -30 overnight and no heat will kill. -30 overnight and no water until Walmart opens is just annoying.