Grand Canyon South Rim Tour We formed a row up against the worn, splintered split rail fence, like football teams at the line of scrimmage, we faced our opponents.  A half dozen pack mules stood at attention, their reins draped over the post, standing across from us patiently awaiting their instructions. Like my gym teacher in middle school pairing us for square dancing, the head rancher assessed our riding ability and introduced us to our trusty steeds for the morning, I was paired with Biddy, sweet but spunky. I mounted the little beast and we all filed in a close line, making our way towards the trail head, on our way…