Game drives start before sunrise, when the plains are cold, and end in the heat of the afternoon. Pack for both.
Layers
A fleece, a light jacket and a scarf for the mornings. You will take them off by ten.
Colours
Khaki, olive and brown. Bright colours and white stand out to the animals; dark blue and black attract tsetse flies.
The thing everyone forgets
A small bean bag to rest your camera on the vehicle's roof. It makes a long lens usable.