You're guarenteed to see hippos and crocodiles. Seeing them like this (out of the water) is easier when the river is lower and more of the sand banks are above the water. But you can also see plenty of elephant, impala water buck, and baboons.
* IMPORTANT: due to restrictions, Atlas may not be able to offer Travel Cover to certain destinations if they are deemed a war-zone and/or if HM Foreign & Commonwealth Office recommends no travel to the area/region/country.