It turns out there IS a track winding back to an old-fashioned shack along the road to Gundagai. If you re on Brungle Road coming in to Gundagai from Tumut, turn left at the Nimbo Road letterboxes, then cross four cattlepits, drive around a very big tree, and wait for the slow-moving cattle to get off the road (twice), you will arrive at a rather charming two-storey fly-fishing lodge overlooking the fork of the Tumut River and Nimbo Creek.
OK, it s not old-fashioned, and the only shacks are six extremely well-appointed cabins in which to stay overnight, but let s not spoil the story.