You can skip most of the packing list.
Been seeing a few safari packing lists around lately and thought I'd share a slightly contrarian version. I run a lodge in the Mara (done a few hundred safaris myself) and a lot of what travelers panic about beforehand just doesn't matter much on the ground.
The short version: most of what packing lists tell you to buy is unnecessary. You don't need heavy boots - game drives are 95% sitting in a Land Cruiser and for a little bit of walking along the river, picnic lunch, your regular shoes are fine.
You don't need a full neutral wardrobe - the real reason for earth tones is laterite dust, not animal vision (most are red/green color-blind anyway). You don't need shit tons of DEET - daytime Mara just isn't a heavy mosquito environment. You don't need a mosquito-net hat. Sunscreen, sunglasses, a cap, layers, comfortable shoes, a fleece for cold mornings. That's most of it - and even if you're missing these, you're fine. Hakuna matata.
Might help if you're mid-stress about your packing list.