I also have thought of that and that is why my system is drained out or I run some compressed air to get all the water out of the lines.
O3 Tundra limited with ATTITUDE,fire truck air horn,extream outback compressor,Ham radios,Motorola commerical VHF,UHF, lowband,800mgz radios with 100 watt pa system.Dual battries, ,KC daylighters,rock lights,RCD 6" lift,air chucks front and rear,tow truck jumper cables front and rear.CB radio for trail comm.Paramedic truma first aid kit,fire supression kit.09 horizon trailer,Warn 9000 winch. Helton heat exchanger,Lowrance chart plotter,David Clark head set for radios. KI6IGN