The Okavango Delta in Botswana is probably the best African photographic safari destination. Not only the Big Five sightings are outstanding, but especially the crisp and clear light makes it easy to get fantastic pictures. The combination of water with mineral rich soil and the African sun creates a perfect environment for wildlife photography enthusiasts.
There are several ways to plan a photographic safari in Botswana. Keep in mind that you want to do photography and that too many fellow travellers on the game drive vehicle will make this difficult. Choose either a self-drive option (or 4x4 with driver/guide) to have your own private vehicle or choose lodges and camps that allow not more than 6 guests on the vehicle. If finance is no obstacle book a private vehicle at the best camps in the best areas. Otherwise self-drive or drive with driver/guide can be combined with camping as the jeeps can be booked with rooftop tents. That lowers the costs substantially.
However, plan with the best light in mind and the best wildlife areas to avoid disappointment. Inquire about practical things like what to bring camera wise and what to wear to have all you need with you, but not too much.
Talking only about the Okavango Delta does not mean the other regions of Botswana are not beautiful and great for photography. Only the delta offers the best light for crisp and clear wildlife photos, one wishes to take home.