Leopard Toad, Square-marked Toad, Greater Cross-marked Toad
I asked the camp staff naturalist about the frogs in the ponds and he said there were two kinds, little "acacia frogs" and big "savannah frogs". I presumed he meant the toads were the big ones, as I did not see or hear any third species. I could find neither "Acacia Frog" nor "Savannah Frog" (nor "Savannah Toad") on the web or in my herps common/scientific names book. These toads were basic toad size, probably between 3 and 4 inches long.
I couldn't find enough information about the toads in this area to identify this guy until I got a copy of Channing and Howell's recent guide to East African Amphibians. Amietophrynus maculatus is similar, but the sizes of the tympana and some color details make me think this is B. gutturalis.