Just got back from my 3rd Buffalo safari. I would recommend:

1) walk (and carry your rifle if you can do so without hassle) at least 3-5 hours a day for a couple of weeks leading up to your hunt
2) bring sunscreen and chapstick and a small bag to hold personal stuff (camera, sunglasses, etc) while in the hunting truck.
3) The PHs I have hunted with recommend a partition (A-frame, etc) for the first shot and solids for the remaining shots
4) sight in at 100 yds and be able to shoot the rifle accurately
5) take a notebook to record details
6) bring more money than you think you will need. Tips can easily eat up $1500.00 bucks nowadays.

BH63