This is my number 1 safari photo tip. Switch to back button autofocus. I only recently discovered this customized camera setting, but I wish I had enabled this function when I first started photographing wildlife on safari.
Once you have booked your safari, in addition to obsessing over what to pack, chances are you will start considering what type of photography equipment you need. Now that you have a camera and a lens here are my safari photography tips from one amateur to another.