From upstate NY down South at New Years. I put a 10 gal. tank in the wet bay with antifreeze in it. It's hooked up to diverter as in a normal winterize, which I do in October. I put about 50 gal. water in water tank but leave diverter on to antifreeze tank just to run toilet if an "urgency" comes up. Whenever I'm willing to risk it I flip the diverter and dewinterize. Flip the water heater bypass last. Very easy, and makes everything comfortable with a case or two of bottled water to live off. Never give temperature a second thought, even had below zero one year and freezing nights until two days into Florida.