How I do it.... NOTE THere part of this is "Secondary" to another issue
Fresh water. Hook up during day. Fill on-board storage tank (The water where I winter is high chlorine this lets the chlorine dissapate) unhook and drain hose.
Waste.. Hook up and Dump. Then "Walk" the hose so nothing in it remains save a few drops and a lot of air.. Now at the "Main" park I will leave the hose hooked up for 2 weeks but empty of liquid Valves closed.. Then I Dump again before I leave (2 weeks later) disconnect drain and stow (I also refill fresh tank at that time)
NOte this means the hoses only contain air except when actually in use. No freezing issues.
Only once have I ever had a problem with this system.. park froze. My hose was ok but park was froze. I had to re-fill at the other park.
