Vintage and film cameras carry risks digital gear does not, from corroding old batteries to light seals that fail in truck heat. Padding each body individually and keeping the collection with you rather than in the truck protects decades of accumulated value.
Pro tip: A soft brush and a can of compressed air before packing removes dust that can otherwise get ground into old shutter curtains during transit vibration.
Watch out: Never leave old batteries installed in a stored camera; a leaking battery can corrode contacts and cause permanent damage in the time it takes to move.