The only place that I can recall from 1981 is Serena Lodge, although it is on the Mara, it doesn't translate to anyone's head.
Minor point or order: Game parks along the Mara (In Kenya) didn't exist in 1979; it was a "Game Reserve".
But one day for a flight Mombasa-Kilaguni-Amboseli and then to the Mara river is a lot of missing everything, even at low level.
However, shauri yako!