I posted on here on my hunt shipping report concerning crating in SA. I have NO idea why people are getting wooden crates, slat crates with cardboard or any other thing used for their shipping of NONE finished trophies home. Call MPact Plastics in SA, they have correct crates, many sizes,, leak proof, shipping certified plastic fruit crates. My last one was 4'x4'x40"H with lid cost me about $180 US. Far cheaper than any crating fees and they communicated and organised delivered to my D&P company. Crate held all hides, horns, skulls from 22 animals from lion, croc and many PG species. Only downside is they are heavier than wooden made crates, mine was 90 lbs crate and lid but this really has no impact as dimensional weight is as charged and normally higher than actual weight.
Not sure about US but Canada has specific requirements for D&P items, each animal piece individually sealed in plastic tubes and sealed crates, if you get the "Canadian" extra inspection then these crates meet all internal to Canada transfer specifics. No re-crating to meet the different standards.
I will never import my D&P in anything other than a Mpact plastic crate.
MB