RE: How many don't scout?
I hunt my place mostly so I don't really have to do scouting since I know where the water/food sources are, the bedding areas and the travel routes are.
However, I wanted to scout a mil-base that I'll be bowhunting this fall and they won't let you. I have a topo-map of the place so that's all I'm scouting.
I think it you can at least stomp out some of the terrain your chances increase, but not-scouting a lick has also killed many a big buck.
Either way...good luck.