Most camp meals center around meat killed by the client or a prior client. Add some mealie meal, and perhaps a vegetable or salad and that's fine. I am not sure what lettuce and veggies cost in various parts of Africa, but the starch is very inexpensive and the meat is typically paid for by a client.

Booze is a different story. A drunk in camp can run up the overhead, but I generally stick to water.

In the U.S. this would not cost $10 per day, so I can't imagine it costing more in Africa.

So I have a hard time accepting the notion that adding an observer to an existing safari would justify a $200 per day increase in the bill.