We have a 2015 323BHS model and are not quite ready to put it away for the winter. We have 1 more trip planned at Thanksgiving but between now and then we are supposed to get some freezing temperatures. Currently, I have the camper in my driveway connected to power and I am running the heater to keep it at 60 degrees inside. What additional steps should I take to protect the camper from the freezing temperatures? I plan to winterize after the Thanksgiving trip.