What kind of rig do you have? If you have enclosed tanks, I would recommend putting some water in your fresh tank and running from it. The temps here (Martinsburg, WV) are going to be bone-chilling...
2007 Excel Limited 30RKE 32' fifth wheel
2003 Excel Limited 35LKE 37' fifth wheel
2014 Ford F350XLT SRW Crew Cab, Long bed 6.7PSD