Not sure if anyone suggested it but if you have any interest in Birding a good field guide is really nice to have along. Another for identifying the small stuff is helpful too, never could keep my Duikers straight.
You could add several hundred species to your bird list in only a couple of weeks in Africa if you moved around at all.
Another vote for Cardhart clothes as they held up to thorns well and the TAG line for lightweight clothes.
Dust control is good to keep in mind, a BUFF to wear while riding on really dusty tracks, scope covers,barrel cover, binocular case etc.
If you can get your baggage down to one rolling duffle and one carry on that is idea. Including rifles taken down in the duffle. The additional baggage and overweight fees add up quickly.
