I did the complete winterazation last fall, with blowing the lines, pumping antifreeze, and then blowing the lines again. I have already started the camping season this year, with the temps. still getting below freezing some nites (last nite, 27 degrees). I don't want to take everything out of the camper, plus do a complete water line winterization at the end of every camping trip, so now I just empty the tanks, blow the lines, leave the cabinet doors open, and pour a little antifreeze down the drains. On cold nites, I run the propane furnace to keep things around 40 degrees. I have the ducted enclosed bottom, so the furnace should keep that fairly warm. Plus I have a set of sting lights on my dump valves......the neighbors sometimes wonder about me.
Chap , DW Joy, and Fur Baby Sango
2017 F350 Lariat CCSB, SRW, 4x4, 6.7 PS
2017 Grand Design Reflection 337RLS