I have used trail cams on two local private properties I hunt. Every other place I just go hunting, sometimes with little scouting and lay of the land. Success for me equals time put afield and I haven't seen a better strategy for killing deer besides being experienced and knowing the land.
It is nice to see pictures of deer but they could not dictate where I set up or take away from the many long hours I will patiently sit waiting for a deer to come along.
Might as well call out feeders, mineral blocks and food plots as well. Those are the real crutches.