You must take a bit of ownership of your game drives. Speak up if you want them to stop, they are more than happy to as they want you to have a good time because they want your tips! Take a long lens, sometimes you might get a leopard by the road but you get a lot in the distance up trees where they normally hang out. I had a 400mm and was glad I had it. Don't expect to get a good shot of a leopard, I didn't, but there are other treats if you put the time in. You might be unlucky until your last drive so don't get disheartened if your first drives arn't fruitfull, stick with them, despite how tempted you will be to stay in bed rather than make the 5am drive, you'll be glad you did. The quality of the game drives within the group differed a lot and this was unfortunate. One group was taken down to the beach for the sunrise and the others missed out, this was a bit annoying as being a photographer it would have given me some good images instead of the leopards who wern't showing themselves at the time.
We had better luck with the whale watching, despite missing one of the boat trips due to rough sea. We saw around 10 blue whales each trip, amongst other whales and dolphins. The boat is perfect for the job. Again you need a long lens despite what you might be told. The boats don't get too close to the whales so as not to frighten them off, blue whales are supprisingly skittish, other whales will come over and say hello. You should also make sure you have a good circular polarizing filter too, mine was very useful. You will need your sunhat, shades and sun cream for the whale watching, it gets very hot out there.
Be prepared for not getting much sleep, the journey there is gruelling (7 hour drive right after a 12 hour flight) I didn't really get chance to recover all week and returned home utterly exhausted but you will have had an awsome week if you manage to stay awake.
The itinerary is very full you will feel like you have done a lot in just a week but it's pretty brutal with 5am starts every morning.