Show them to the agent who comes out to give you the estimate. They are the best people to ask, since they are ultimately responsible.
It will be expensive, since they will probably suggest something that will be overkill, but they want to be sure.
There is no simple way out......airplanes are fragile.....and the move can be rough. They gotta be packed to take the worst.
Some movers may not even want to move them.
Wooden crates are the best way. You build the crate to hold as much as it safely can. Lotsa foam and bubble wrap. And fasten everything down to prevent movement during shipment.
Good luck.
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