I'm so sorry you lost your sail.
When traveling with The AI's on our double AI trailer, after sliding the sails into their bags, we put short cam straps on our sails connecting them to the front and back cross bars. Because I didn't want to crease the sail material, I didn't cinch them up tight. I did add extra security by putting a shock cord around the bow of the AI and the top of the sail and another shock cord around the stern of the AI and the base of the sail. We left the sails this way when they were also loaded onto the ferry. When we returned home from our trip, I checked the sails and didn't notice any damage, although I can see how cinching them up like this could be damaging.
Reading these posts, I'm seeing this is an incorrect way to transport the sails.
Any ideas on how I can transport them on the AI double trailer so they won't eventually be damaged?