Mort,Welcome to the AH community. Someone above gave wise counsel in that too often we get bogged down in safari planning with the minor details and miss the big picture. My advice is focus on the safari itself. Once back home, use that time after the safari to research the best way and broker to get your trophies home. I have never really worried about the how it gets back. In eight African safaris I have had only two capes that did not turn out as usable. I doubt that was from transit, but more related to the prep by the outfitters team, and both capes were easily replaced by different taxidermist without additional charges, which I would have been glad to pay for.
While I can understand not trying to get stuck on trees and enjoy the forrest, I do think that it is important to have an idea of how my trophies are going to get back before I go. Especially since the world is seeing the biggest disruption of travel since WWII. This trip has been a long time in planning and the world is not what it once was.