Ralph has given terrific advice, and I concur. This was the first time I tried the video feature on my point and shoot camera (Kodak 12x zoom, 6x optical) and it worked brilliantly (sorry German kezboard so typos are inevitable). There are a few things a still photo simply can,t capture - seeing the effort it takes for a male lion to issue a full-out challenge roar, for example.
Read up on the camp's website for any blog or ranger reports. If something isn't current and they have an archive, read from one year ago. It will help to understand what kinds of highlights you may get lucky and see
Hard to do, I know, but put the camera down periodically to focus attention on how the animals live. The interplay amongst the animals is worth observing. Birds will start the calls - babboons are next - etc. There's almost an animal internet that you may start to understand.
Walking safaris at midday are so-so. If you can do them early or late, they are better. If you do plan anything outside of game drives, one extra pair of safari pants. There are thorns out there and they can tear clothing (better than skin, of course)
We were lucky enough to get frequent flyer tix. Routings were lengthy. Sing Air out of JFK was very good to Frankfurt. South African air with new business class is best. Several bought coach tickets * 1 extra seat and were comfortable (Delta, South African Air). Much less expensive than business class. This strategy will net zou the shortest flying time. A little tricky, depending on who is manning Dakar transfer gates.
Lightweight hiking shoes are better than tennis type shoes.
Smaller memory cards are better, and back up batteries for charging is a good idea.
Have a great time! Massages at Hermanus were good and reasonably priced.
Cheers, Anne