RE clothing, what time of year are you going? Remember that their seasons are opposite ours. We went in August to northern South Africa (winter there) so we needed several layers for the early morning rides but by 10-ish, could be down to tee-shirts and be by the pool by noon.

Also, the insects are less, and the bush is skimpier so the viewing of animals is better/easier.

Have a great time; it was easily the most exciting trip we have taken. Enjoy.