Not unexpectedly, our first venture - a mile hike up Emma Gorge, one of El Questro's most dramatic geological landmarks - was greeted with near mutiny. We were guided by Celia and Will Burrell, El Questro's young owners, and their four-year-old daughter, Coco. They looked cool and composed. We looked limp, pallid and shambolic by comparison. "My legs feel wobbly," moaned Ned, our five-year-old, as we launched ourselves up from a riverbed across an anarchy of rocks. If this was Survivor, I thought, we'd be voted off en bloc.