One of the biggest (in numbers) safari trends is the explosion in ape adventures. Even ten years ago, few people had even heard of gorilla trekking, let alone done it; today, it’s become a common dream trip. The good news: as gorilla traveler numbers have grown, so have funds for conservation. Trekking to see chimpanzees, which are biologically even closer to us, is just as thrilling—and maybe more revealing as they relate to us humans—but it remains a much wilder experience and is likely to sta...