Using an RV in chilly, but not fridgid weather

Full timed going on five years now. Coldest winter stays were in Trinidad, CO-12 below, other was Winnemucca, NV- 15/20 below. Had good insulation and used a "Spirit" outside water line. Has it's own built in heat tape and sensor. Thankfully never froze up through those winters! Had fun. We don't worry much where we are at in the winter.