We use ours for a variety of things. More common, we have a fish cleaning table from bass pro. You can remove the sprayer head and screw the hose straight to the faucet and have hot / cold water in the sink. Other than that, I much prefer to wash my cast iron pots with the sprayer than to mess up the inside sink. Also use it to wash off kids sometimes. Winterizing no big deal, but we don't winterize being we camp all year. Install stop valves inside where you can access the water lines, blow lines out, close valves, remove hose and don't use it if you don't want to. Everything else in the camper will have water but that. If you want it, turn it back on.
John and Rebecca Dickson
Emma-8 / Little John-5 / Iva-1+
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)