Leave the camouflage. It is illegal to wear in Kenyan parks and it photographs badly. Khaki, olive, sand and black are enough. White shows dust by lunch.
Mornings in July can be 8°C in an open vehicle. A fleece and a scarf matter more than a second pair of smart shoes. Evenings in a tented camp are the same temperature with better lighting.
Bring a soft bag, not a hard suitcase, if small aircraft are on the ticket. Weight limits are real. Binoculars you will actually wear. A power bank. Any medication in original packaging. Sunscreen that is not a novelty size.
Luxury here means good linen, a serious guide and a private table — not a dress code. If a lodge wants a jacket at dinner, we will tell you. Most do not.