If you feel that you don' t have the skills to kill a trophy buck,or your ego demands that you kill a large buck in very short time, hunting deer that are penned in and can' t escape may be your best chance of success.On the other hand hiring a guide to hunt wild unfenced game is the only way a non resident is legally allowed to hunt certain species or to hunt in some states and provinces. Hunting private land(with no game fences) unguided is a different circumstance again as you still need the skills to be able to kill the deer on your own and the private land just prevents interference from other hunters.