Buy a set of these closet rod supports.
$12.47Stanley Hardware 819088 Wood Closet Rod Socket
Buy an extendable curtain rod, and some Shower curtain hangers.
Buy a nice piece of heavy fabric that matches your MH from a fabric store. All you really need to do is cut small holes in the fabric along the top and attach shower curtain hangers to it.
Attach to curtain rod and you are good to go! Slides easily back and forth for access to the coach when needed. A good heavy fabric will keep the front of the coach nice and warm with your engine heater.
Note that the rod supports pictured above allows you to easily remove the rod. Some are closed and are permanent this one allows you to slip the rod out. Nice looking wood too so you won't mind them being there.
We must be willing to get rid of the life we've planned,
so as to have the life that is waiting for us.