cats can be caught on anything that will catch most other critters. they hunt with their eyes more than canines so you need to be on location with your set. A flashy dirt hole like dietsch said in the travel path of a cat is deadly. that being said i have also caught plenty in flat sets on log roads because the set was right in their path.
worry about finding the cat and where it is traveling. the set and lure are secondary.
As stated above, don't worry to much about bait. Even the ones I catch in Feb in coyote sets are still nice and fat.
Caven's yodel dog works great for me.(Its my #1 choice) I make a lot of flat and post sets. Use mostly coyote urine until the last week of the season. Then I switch to cat. I do use cat gland lures mixed in here and there. John Graham's Tomcat and Bad Lands Bob. I also like Kichel's Cross breed and Triple Dig It.
Have caught only a few on baited sets.
If you want Bobcats go to the clear cuts in the woods.(set traps on the old logging roads as stated above) That's where the mice, grouse, rabbits, and other tastey things for cats live. SCOUT!!!!! FIND TRACKS AND DROPPINGS!!! Remember that spot, set traps there!!! I would use flat, post, dirt holes, and whatever set you want to try. Use flashing and don't use flashing. Competition???? If so then better stick to flat and post sets blended in. And use either drags or earth anchors with "J" hooks welded shut. Won't stop them from stealing your cat but you might still have a trap. I use about 85% drags on my line. Cats only get about 20 or less most of the time, but I trap clear cuts.