I did this tour in March. It meets at Sanaa at around 9:45 and leaves at 10:00. There you board a truck in the front of the Kidani lobby and they drive you around the back to the Sunset Savannah. You only go through the Sunset Savannah. Each person is provided with night vision goggles. You drive very slowly and if any animals are near, they do stop. On our safari, 3 giraffes were hanging out near the Jambo Sunset lounge overlook and we stopped very close to them and got to observe for quite a while.
Since we had such a close encounter, our safari was wonderful! I have also done Wayama, and I actually liked this better. ON that one, they go through 3 savannahs, but really don't stop.
WHen the tour is done, they drop you off in front of the Kidani entrance.