I don't know, maybe I just don't understand how to use them or don't try hard enough.
I do have a camera out for the summer and fall months and love looking at the pictures from it. I've gotten some great shots of all kinds of deer. Fawns, does, small bucks, big bucks, along with all kinds of other animals. I have one sequence of three pictures of a coyote, each taken at a different time and each with a small rabbit in his mouth. Obviously he had found a productive feeding grounds and kept coming back for more. Very cool!
And I have gotten pictures of a number of good sized bucks that I never saw while hunting. Still cool to know they are around. But I personally think the possible benefits or unfairness of using cameres is greatly overexagerated.
Like I said, maybe I just don't get it, and am not a good enough hunter, but it just doesn't seem like I see the deer doing the same thing at the same time of day over and over. I've had my camera on the same tree overlooking a small seasonal water puddle. I seem to get plenty of pictures. Maybe if I just tried harder I could make it work to help me kill more deer....
In the meantime, I'll keep using the camera and enjoying the pictures I get from it. I just don't hunt any differently because of anything I've seen on it.