When I pack a bike to send I use a simple and effective method of determining what procedures to use. I try to imagine how the exterior envelope might be penetrated and how to protect any two components in the box from making contact with each other. I use the worst possible scenario for preparing for shipment. What if the box is thrown? What if it is shipped upside down or with heavy objects placed on it? What if the exterior boxing is torn? I prefer the use of extra cardboard separating wheels from frame - components from wheels etc. I wrap each tubing with cardboard so that the bike looks like a paper mummy. Of course I use wood or plastic dummy axles and shift the derailleur to the largest cog. It takes extra weight and may cost a few extra dollars in shipping but it doesn't take me longer than an hour to do it.
My wife says that this type of defensive behavior is negative thinking like how I protect my house against burglary or confront a hostile person while I go about my job as County Officer, but I say that this type of negative thinking consistently keeps me out of trouble.
Garth Libre in Miami Fl USA