As a hunter, I would never walk up on a group of other hunters unanounced.
Politically, this is devastating to Cheney. Two important questions remain unanswered: 1. Why would Dick Cheney shoot an unarmed elderly man?, and 2. Why after shooting him he didn't immediatly call David Gregory?
Just common sense.
I would agree that this "hunt" was rife with logistic problems. From the Secret Service to the drive and shoot.