Our brand new 2014 Solera 24R is our 4th RV in 12 years. Excepting the first time I have never used antifreeze to winterize (except for the traps). It is not the cost or the bother, it is the time that it takes to rinse it out of the system I don't like. I was just reminded of this when I recieved our new Solera three weeks ago(it had been winterized with antifreeze). I cannot stand the taste of the antifreeze, and it takes so long to rinse it out of the system. Today, the temperature at home this morning was about -22C or -8F which is normal in this part of Canada.
We just got back from a trip to the southern Atlantic states over Christmas. I carried 5 gallons of fresh water from home. After driving south far enough, all I had to do was dump the water into the fresh water tank and turn on the pump. This allowed us to enjoy the use of the water while driving (Instantly!!! with no rinsing). When we drove back I did the winterizing in the south end of NY state. We boondocked for the night. In the morning after breakfast I started. I had packed a small airless compressor for the task.
After draining the fresh and hot water tank and turning the valves for the hot water bypass I pressurized the system through the city water supply inlet. I then opened all the valves including the low water drains, toilet and outside shower one at a time starting with the ones closest to the pressure inlet. In each case I allow the pressure to build up before opening the valve which helps to clear the water out. I then repeat the process. I then disconnect the waterpump and screen and turn it on briefly to clear the pump of water. Takes all of twenty minutes. I do put a small amount of antifreeze in the traps. I leave the Arctic pack turned on until I dump the waste tanks, normally at my next fuel stop.
Normally you would also have to deal with the water filter, but I replaced mine with a 6 inch pipe nipple to avoid the task. If I do another trip before the winter is out, I fill up my 5 gallon water jug and repeat the process.