Both the frig and AC drains are self draining and unless they have become plugged, quite unlikely, they will not be a problem.
Liquid soap in a dispenser may be a problem. Not so much as the soap up in the bowl but the soap in the dispenser valve because there is no room for expansion while thawing.
Battery leakage is more a factor of age than temperature so to be safe remove them.
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles