Bordering the Ngorongoro Conservation Area and Maswa Game Reserve is a small private concession called Mwiba. And there, tucked among the giant boulders and ancient trees overlooking a rocky gorge on the Arugusinyai River, is Mwiba Lodge. This is top-end luxury in the wildest of settings. The acacia- and coral tree-studded landscape is fed by more than 30 freshwater springs, drawing wildlife from near and far, including the elusive Mwiba leopard. Each game drive is full of surprises. If…