I have two other suggestions, speaking of power.
I brought a very small power inverter that plugs into the cigarette lighter. Unfortunately, that didn't work. Next time, I will bring that along with a couple of solar chargers which can be purchased at places like Bass Pro Shop, etc.
I recommend also bringing power adapters for the country and a few extension cord/plug multipliers. In the bush, electrical outlets will be scarce, and many times powered by generators which go off at 9 PM, so you need to power up as much as you can as fast as you can.
Bring plenty of AA batteries as well. I am ambivalent regarding rechargeable batts due to limited plugs and need for extra gear. You need to be very careful on luggage size and wight limits. You may find that all weight is taken up by photo gear.
It depends on how you plan to power everything. Laptop, solar, or what. Someone could give you a better idea if they had enough information to make a sensible recommendation. You cannot just hook a hard drive to your camera.