You have all been SO helpful! Thanks. I will open the faucets, make sure the pumps are off, and plug in the mo'home and run a small electric heater. If I were plugged in and had plenty of propane couldn't I just set the thermostat for 55 degrees or something and let that do it when it gets too cold? Klamath Falls is warm and springlike during the day but still gets early morning low temperatures into May. ANother really funny thing, however, is that I live in an area with geothermal heat (my house is heated with it) and the pipes go under my driveway. Plants grow there that won't grow anywhere else in the basin. I'll park the motorhome over the pipes!
For some reason the home didn't come with an overall manual, so I will have to track down winterizing procedures sometime before next winter. I have written Dynamax, but as someone here said earlier, they no longer make my model, so I am not sure if I will be able to track anything down.
Winterizing seems pretty straightforward. Drain everything and open everything! We did learn how to do that.