Just traded out of a Laredo 5th wheel that I had finally gotten set up well for winter boondocking in the Rocky Mountains. Had it down to -15 degrees overnight a few times had had no issues with freezing lines or tanks.
That is the key right there..Each camper is different and needs to be set up for the cold on an individual basis.Some freeze here and some freeze there so it all depends on your unit and how you use it.
I have found skirting and a light bulb do more than any heated holding tanks..At -15 degree's with no skirting/heat pads and your tanks or lines not freezing is an accomplishment for sure.
You should be telling,not asking!:B
