It's easy to know what you want to hunt until you have a big eland bull broadside at 23 yards. Be open minded while you are there. Some concessions also offer "culls" that they feel aren't trophy material. They may offer considerable discounts on trophy fees for culls.
Most PHs really prefer fixed blade broadheads. You might consider bringing a few just in case.
The PH will likely have you "sight in" your bow when you get there. They are judging your abilities with a bow, and that will impact how they hunt you and what opportunities they tell you to take advantage of. This is a test, shoot well at camp and they will give you some more freedom.
Ultimately you are the client, listen to the PH, but make your wants known.
Every camp I have been to there has offered daily or every other day laundry. Don't overpack. The trackers really seemed to appreciate American cigarettes. Hit the Duty Free and get a case of Marlbros on the way in, and you might make a friend.
Enjoy the trip, and please post pictures and stories when you get back.