Jacks up when driving the coach.. If you start it, drive it, don't let it sit sit sit.
Theory: A motor vehicle is designed to go rolling, rolling, rolling down the highway under it's own power... It is not designed to sit,sit,sit.
Fact: Many things.. Tires for example, Brakes, and even the engine, benefit from the application of said theory.. For example. Tires, flexing of the tire from rolling down the highway brings essential oils to the surface reducing or preventing cracking and crazing and dry rot. Transmission, Rear Ends and the like, it circulates essential lubricants geting everything well coated.. Brakes, brushes surface rust off the rotos or drums before it gets critical, lubs up the hydraulic pistions and cylinders if hydraulic.
Engine: Getting it up to full operating temp for a while (Which requires loading it down) burns off moisture that collects in the oil, and other impurities that can seriouslly affect the life of the engine (in a bad way).
So DRIVE the thing. and that means jacks UP.
Home is where I park it!