I was wondering if anyone has compared the prices of an overland tour (Dagobar, G Adventures, etc) to just planning out the trip on your own. We would have about 3 weeks. The main places I'd want to go are Nairobi, Serengeti, Ngorongoro Crater, Zanzibar, and ideally all the way to Victoria Falls (with some stops on the way if taking a bus). How expensive are flights between places? Buses? Any and all help is appreciated! Thanks!