My teenage son and I arrived at the Tarangire Treetops Safari Camp in the late afternoon. A day of safari through the Tarangire National Park had put us face to face with lions, elephants, baboons and a number of gazellelike creatures of varying types. It had been a terrific first day of exploring Tanzania’s Northern Circuit, and we were eager to see firsthand the camp we had heard so much about. As the Range Rover …