We live in Ontario and go south in the winter. A few years ago we were in Texas and it got cold enough on the coast in January that the lines to the shower froze in our 14 BDS. To prevent this going ahead I wrapped the main lines running down the side with heat tape and insulation. Sold it before the next winter but it allowed me to keep it unwinterized when I got home till the weather warmed up. It wasn't too bad of a job.