I agree with the others-glad you're going to get an important bow back. In 4 trips through Jo-Burg I haven't lost anything. But, then again, only two of them were on SAA. Again agreeing with the others, there are many good reasons for going with a really good outfitter(and the best booking agent, and the most experienced travel agent for Africa.)
From my experience, the bigger the importance of the hunt, the more ways it can go wrong! Regardless, all we can do is make the best of it. My first trip to Africa was with my son,who I've bow hunted with for nearly 20 years. He had some valuables and electronics stolen from his baggage on Delta out of Atlanta, and then on Delta out of Jo-Burg. Bummed him out too, but-hey-we both have a lot better things to remember than that. And, I know you and your son do too. We all know that's what matters - sometimes it just takes a little time to get our perspective back!
Insofar as bows to take along to minimize hassle: I've taken two takedown bows packed with the right arrows in two different checked bags. Yes, it costs more in extra bag fees,but-if they were to ever lose one, I'd still be in business.
Regards,