We did not take along any special clothing. We all wore shorts and layered clothes, especially in the morning when it can be quite chilly, but once the sun comes up, it is warmer. We did bring some bug spray with DEET, but only for use near the tent at night. There really weren't many bugs. I was surprised.
I did bring my laptop and as a President's Club member you get free internet. They also have 2 desktop computers to use that are free for PC members. However, the connection is really slow. Remember, you are really in the middle of nowhere. There isn't a fibre-optic cable nearby. None of us were able to get a cell signal for our phones, so they are completely useless. Someone said they had 1 bar on the far end of the camp, but I could never get that bar, so I gave up after 2 attempts.
I really didn't have any issues with dust. I did bring along a lens cleaning rag and some lens cleaner, but I don't recall having to use it except the day we went on the wildebeest migration trip. We were in some ultra rough country there. As for camera and lenses, I think many people over-do it and bring alot of stuff that isn't necessary. But if you really get into changing out lenses while standing up in a roofless jeep, then more power to you. We saw people with tripods and beanbags and lenses that looked to be 2 feet long. Listen, the photos I saw taken by 12 year olds with the 2.1 megapixel Kodak were just as good as anyone elses.
As for the safaris, your driver stops when you tell him to. Just tell him to stop. They often will ask you what you want to see that day, or tell you that there is something happening nearby and want to know if you are interested in it, then drive off to whatever you choose. If you see something you want to take a picture of, just say Stop, please. And they will happily stop as long as you want. We frequently stopped and sometimes for 10-15 minutes if there was something really cool happening. We watched some serious lion porn one morning for over 30 minutes. They were mating out in the open and were not shy about it at all. So, we have movies of that. It's not so common to see lions mating apparently, so we stuck around for the entire peep show they gave us. And I mean, we saw EVERYTHING. The drivers are there to take you where you want to go and do what you wish.
Yes, there are daily walking safaris that take place after lunch but before the afternoon game drives.
Hope these answers have helped you.