I'm so sorry to hear about your misfortune. I'm glad to hear that no one was hurt and that you're going to rebuild. This really shows the strength that can be created with lightweight and somewhat fragile building materials. A real testament to the foamie way of construction.
One small thought ... if it would have been me in that situation, I think I would have filled the trailer with rocks and dirt from the side of the road rather than cutting it up ... but I wasn't there to witness what you were dealing with.
Best wishes,