I've packed my Touring Bike for the several European tours I Flew across the Atlantic to start. (abandoning the carton/etc. at the airport)
I now, have the summer P/T Gig of Packing to ship Touring Cycles Back East when they dont want to turn around and Ride Back .
Removing the RD also removes a bit of leverage that may bend the RD hanger in a dropped [corrugated fiberboard] Box situation ..
rear wheel remains in place, the front fork is where the blocking spacer is put in , when that wheel is Removed ..
Replicating all the packing materials used in shipping a New Bike in the Box drom the factory assembly line is Ideal .
There is a huge waste stream of those Packing materials in the weekly Refuse Pickup at the Shop Curb..
single use Plastic Protectors on the rear axle over the RD is just part of the dumpster discards..
Why not drop by the LBS and pick up a few of those Bits, and the rest of the kit.. Maybe Buy New zip ties , if they cut the heads off
the ones used in factory packs.