I'd shrinkwrap the hull to the strongback, cam strap at each section then strap the strongback to the racks.

1st question is, do you thing the hull would survive the trip?
2nd question is, how much of a PITA would it be to re-glue the separated seams and resand the hull? Is this a lost cause? Are there any pitfalls?

Your transportation plan is excellent. I would try gorilla glue on a seam to start. Gorilla glue expands and will stick to hardened carpenters glue perfectly. The foaming action is easy to scrape off and sand. I would use an artists pallet knife or a utility knife to work it in between the seperated strips. I can't imagine this being a tough chore at all.