[Richard]

I won't go into a thermodynamics lecture, I promise. However, the least bit of moisture in compressed air will condense any where there is a small leak, orifice, or flow through a small jet. It's because the air cools when it flows through a jet. This means that in really cool temps, ice will form at these places in your air lines even if your tanks are dry. Our dryer systems don't come close to the dryer systems that industrial facilities use for knocking the water out of air.

As country as it may look, I really will keep Rudy's suggestion about wrapping a skirt around the bottom of the coach as an idea if I am ever in teens and single digits for any period of time.

Good luck with the antifreeze.