We have a 3650RL with the full size Refrigerator and Ice maker. Also, this unit has the yeti package with covered underbelly. The water line to the refrigerator is connected under the kitchen sink and the refrigerator is located in the slide-out. My question is: since we plan to live in it during the winter in northern Ohio, will the water line to the refrigerator freeze during winter? Should that part be winterized?