Hello Entirelynutz,
Welcome!
To keep your freshwater tank from freezing, simply empty it. You can use bottled water and go without showers until you get far enough south to fill your freshwater tank. As for your black and gray water tanks, they should also be empty when you start out -- no need for anti freeze. You can use the black and gray and use your bottled water to flush and wash hands. Anything in black/gray tanks may freeze, but should not cause any damage the tanks. From Pennsylvania, you should be in warm enough climes in one day, or 2 at the most.
Judging from the current weather forecast, you should have already winterized your unit.
When are you heading south?
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2010 Winnebago Journey Express 34Y
2010 Freightliner XCS (mfd 9/'09)
'07 Saturn Vue V6
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