I'm strictly a bowhunter. Not one of those "bowhunters are better than everyone" guys, but I just prefer the bow. Therefore, I always take two. I just returned from a Lion hunt with Paw Print Safaris. I took my new Mathews Halon as primary bow in an SKB case with a fly rod tube full of arrows. My old Mathews Creed went in a rolling duffel bag with another fly rod tube of arrows. Both arrived safe and in shape. Frankly, I hate taking the SKB because everyone at the damn airports thinks its a rifle. Increases the "pain in the ass" factor significantly. Normally I just take a roller duffel with two bows in it but as this was a lifetime trip for me, i took the hard case as well. Remember, you really don't need many clothes in africa (daily washing) so don't clog up room for your bows with worthless clothes.
Some points to consider:
1. Take cell phone pictures of your rest and bow sight settings. I used to mark them all with a paint pen (like crafters and high school cheerleaders use) but now a quick pic with the cell phone cam works to make sure your settings are the same when you left home as when you get into mother Africa.
2. BUY DOVETAIL SIGHTS. A simple removable sight is so much easier than worrying about broken/bent sight assemblies. I have a TruGlo and an HHA. Both dovetail. They travel in my computer bag with me and nobody touches them but me. The HHA is great for precision distance hunting and minute lighting changes (read into my Leopard hunt someday where the tree is a known, set distance). My TruGlo is a five pin setup that I can shoot with my eyes closed. Both have a purpose and i can shoot both equally well.
3. Broadheads in a box. There are several great companies that make little broadhead boxes....my company will be too shortly! Keeping your broadheads in a separate compartment greatly reduces the chances of one getting loose and cutting vanes...or worse...cutting your string. Never travel with broadheads attached to arrows. That's pretty obvious but people do it all the time.
4. TWO RELEASES or more. Never rely on just one. I keep one in each bag. That way no matter what, I would have a full setup as long as one bag arrived (bow, sight, release, arrows and broadheads).
5. Similar setups - No, mine are not exactly the same but they are close. Both bows use the same rest so I can use one for parts or completely transfer if the other goes down. The releases are identical and I use them both when practicing so they are both broken in. Sights are different but easy to re-sight if needed.
6. Underwear is your friend. I always put a pair (or several) on top of my bows. If the TSA or customs agent really wants to dig through my undies to check out my stuff he/she can but most of the times a brief look to see a cam, limb or string under the undies is enough to keep them from going through your bag. Childish...yes. Worth it so some idiot doesn't dry fire your bow...yes.