Regardless of the size the systems are basically the same when it comes to winterizing. empty the black, gray and potable water tanks pump RV antifreeze thru all the water lines including the toilet spray hose if you have it the outside shower and low point drains, I also pour antifreeze in the sinks to fill the traps and get antifreeze up against the dump valves.
Jake my sidekick (yellow Lab)
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho