I look for a tree that is downwind of the trail and close enough. I use a strap on stand so I don't need a smooth trunk. It has to be big enough so that it doesn't move when I do. It has to have enough branches for concealment but not so many that I have to do alot of trimming to be able to shoot. You don't necessarily have to be high, just concealed. Any height will be an advantage. I you can get up 8-12', that is enough.