16' Keystone Passport cold weather camping Q

Thanks for the replies, good to know about the anti freeze. We are going to be staying at a campsite that has full hookups, so as long as there are no problems at the campground, power shouldn't be an issue. I can carry 40 lbs of propane in 2 tanks, hopefully that will be enough.
Any thoughts on the fresh water drain tube? Should I put some kind of insulation over it just in case?