We had an 02Journey for 8 years and always filled the tanks in December before leaving for the south in the winter for at least a week or more, we also spend a month in Maine and Vermont in October into November with no problems. In December we just keep the gas furnace on around 50 degrees the basement water areas are all heated, maybe not really hot but they prevent freezing, most all Winnebago and Itasca class A's have heated basements. In extreme cold for extended periods I would try temporary insulation in the compartment that houses the black and gray valves at night maybe a light bulb or small space heater on very low and keep the hoses disconnected and boxes closed tight until you fill or dump.
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07 Itasca Ellipse 40fd, 2014 Honda CRV, greyhound lab mix, pit pointer mix(RIP bessie) , shar pei mix, stupid cat, wife
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