I wish I was going with you.
Having been to Africa on several eclipse expeditions, here is some packing advice as you prepare yourself for a grand adventure.
Clothing: Pack light and loose clothing. You want it to breath and you will want to wear layers. During the evenings and nights it can be chilly. Select colors that are natural in order to blend in better on those days you are on safari.
Equipment: Beyond your camera rig, bring binoculars. The sky above will be awesome on clear nights when you are away from the cities. Also, they help when seeing animals in the distance.
Bring old clothing that you can leave behind. Buy new stuff while there and fill your luggage. The donated clothing will go a long way in making someone quite happy.
Clear sky! Bill