One of the gentleman that works with me down at the shop hunts almost exclusively from the ground and without the use of any type of blind. His approach is quite simple actually. He sits facing a tree wide enough to break up his outline and about 20 yards off of the trail he is watching. He sits just enough to be able to see past the tree to the trail. When a deer approaches he draws behind the tree and then slowly leans over to get the shot. It works quite well for him as he has shot a deer the past three years running.