Water in winter

I can only speak of my experience in cold country. I winterize when the temp drops below 10 degrees while on the road. I blow out my lines with a portable air compressor and drain all tanks. I use RV antifreeze to flush toilet and bottled water to wash and cook with. As water goes into grey tank I add RV antifreeze although I realize tanks are heated and I am reasonably safe. Blowing out lines only takes a few min. Since I don't use pink stuff I can dewinterize within minutes. You just have to be flexible and act accordingly. I have a temp monitor in my wet bay. However, my ice maker line is out in the open. Just look at your RV and decide what may be a problem in freezing weather.