We've been tossing around the idea of using corrugated plastic as a outer skin of a trailer idea. I've done a little digging on the subject although not an extensive amount.
I do know it's pretty strong stuff and comes in several different types, the most common most of you are probably familiar with is the same stuff you often see political signs made from.
Here's one guys bicycle trailer made from recycled campaign signs.
Micro airstream bike camper - Creative Ideas | Elkins DIY
I could be wrong, but I'm guessing it can easily be beefed up with the right framing to be incorporated into a regular trailer or even possibly on a flatbed of a truck or van..
Any thoughts or suggestions?