A group including a member of LogMog took 5 Morgans to New Zealand a couple of years ago. Two or three cars to a special car shipping container with proper shipping tie down points.
The cars had to be biologically clean, all surfaces, inside and out, including tyre treads and wheel arches had to be stream cleaned and looking "as new". The carpets had to be removed and all areas vacuum cleaned and under the bonnet there had to be no evidence of road grime, or oil leaks.
Inspection at Aukland took about 30 mins per car. I seem to recall, but am not sure, that the paper work included a statement by MMC that the ash frame had been impregnated with preservative.
As the cars were in sealed shipping containers they packed most of the personal effects in the cars, so they could fly light! The voyage, via Honh Kong, took 6 weeks, but nothing was lost or damaged.