I posted a thread called
http://ecomodder.com/forum/showthrea...ere-35685.html for people in exactly your position. So I draw your attention it.
The whole thing devolved into a discussion of how to load MDF into shipping containers.
Maybe you could de-zombify the thread. It uses a flexible spine instead of a trailer. I'm thinking: Trolley Winch. ...and using trampoline mesh for the membrane.