I like a big flashy double dirt hole set for cats. Coyotes seem to shy away, so I will put a flat set in within 20-30 yards with the same bait/lure and that will usually catch them. Setting on sign will catch them over anything, whether it be tracks, a toilet or just historic sign. Cats are much easier to catch than coyotes, you can guide them easily, it is just finding consistent sign that is the hard part.