Depending on where you are going, I would suggest you buy cheaper cotton or synthetic as the cleaning in Africa beats up clothes pretty bad. I have made 17 trips and now only take clothes I plan to leave behind. I leave shirts, socks, pants, belts, hats and toiletries. The local folks use it or sell it in the markets. It also lightens your load on the trip home.
Only take what your outfitter/PH tells you. You will not need knives, multiple cameras, more than 40-50 rds of ammo. Leave spotting scopes at home, take a small 8x30 pair of binos and leave them behind if you can....