Definitely not a pro but I have caught a few in cage traps. Couple of simple tips that have helped improve my chances: 1. As mentioned hang a feather, wing or or something that will flutter in the wind 3-5 feet above your trap. 2. Brush in your trap around the sides and back , so a cat cannot get to the bait or lure without going inside the trap. 3. Use a lure scent ( I use Cat Collector), don't over do it, I put a glob about the size of your thumbnail on a stick and throw it in the back of the trap or rub it on the bait. 4. Dirt in the bottom of your cage, I have been told they do not like the feel of the wire mesh. As for the traps, I have found height and length matter more than width. The bigger the better! Shoot me a pm if you would like and I can get you in contact with a guy that sells cage traps in sets of three. They all fit inside each other and are light enough to pack if needed. A set of three costs $225 last time I bought some. He lives in Grand Junction, but I have guys that travel to Denver weekly that I work with, so I may be able to help you out if you are interested. Good luck!