A friend of mine uses this set-up in barns with great results. He keeps changing the bait with the buckets until every coon is caught. The farmer loves him for it, new coons move in every year and it is an ongoing event. He had one coon that wouldn't come in for fish, or lure, or corn, so one morning he was cooking bacon saved the grease, poured in two drops of peppermint cooking oil, some peanut butter, and tried it. The coon was caught the next morning.
All animals have trails.
When you find a small trail going through thick brush, you will find a spot all narrowed down with brush over top. This is a perfect place for a trail set. On the farm I trap, I walk along the edge of the woods looking for coon trails. The coons drag the corn into the woods so the trail is easy to find. If you are in a high coon area, you can set 1 to 4 traps on one trail.