One guide, the whole route
Your driver guide stays with you from the airport to the airport rather than changing at each camp. They spot, they explain, and they know where the light will be good at six in the morning, because they have been in that place at that hour many times.
It also means the day can be re-shaped. If the cats are still active at nine, you stay out. If a child has had enough at eleven, you come back. Nobody is waiting for the next group.
And there is a Nairobi number that answers while you are travelling, not only before you pay. Because the vehicle and the guide are ours, there is nobody else to consult first.