Wow Hix, you certainly have not wasted any time uploading photos from your Uganda vacation. Thanks mate! How many acres was this exhibit? It appears to be a vast enclosure.
It's enormous, and I'm not really good at estimating size (in acres/hectares etc). But to give you some idea, there is an ostrich on the right between the two trees, and there are sime antelope towards the back between the termite mounds and the trees at the back. Those trees at the back are also part of the exhibit. This phot shows about 2/3 of the enclosure.