In my opinion this is a tough question to answer.
You must realize how many different entities are involved. The US government has rules. Each airline has their own rules. And each country has their own rules. And on top of that, many government and airline employees do not know, do not understand, or misinterpret their own rules. Add in the fairly rampant corruption and general love of bureaucracy and power among the African security employees in the various countries, and the whole thing is a crapshoot.
Yes, you may have researched all the above rules and have a good understanding of them. But you are still at the mercy of a series of bureaucratic drones at every step along the way, any of whom has the absolute power to ruin your hunt, whether through ignorance, corruption, or malice.
It's easy enough to cover your bases, buy a pack of TSA locks on Amazon, and throw them in your carry-on. They're not that expensive, they don't weigh that much, and if you're called upon by some kind soul to lock something, presto! Problem solved, hunt saved, worth every single penny.