I always kept my pup in the garage and in North Georgia this was always good enough to avoid the cold since it never got colder than 55 in there even if the outside temps were in the 20s. But with my TT I am now 100% outdoors so this is suddenly a concern. I'm inclined to think I don't have to worry about this. The underside of the TT is coated in spray foam insulation then covered with a plastic-like cover. I'm thinking all I need to do is make sure the lines are drained. I really don't want to winterize because we camp quite often even over the winter months. Thoughts?