Only use your water hose to fill your fresh water tank.  Roll your hoses up as soon as your finished.  Buy "Reflexic" at Lowe's, Home Depot, and cut it to fit every window.  Put tire pads under your tires to help prevent from your tires freezing to the ground.  Make sure your Propane tank never goes empty.  Put HEET in your fuel tank.  But really as soon as you can, drive to a warmer climate.