I am not a cat trapper but a cat caller, here are some techniques that work for me as far as finding cat locations and core areas. First and foremost is snow, when that happens drop everything and hit the hills, look for tracks and get out and walk, the tracks will revel a lot. The next best is to look for turds and scrapes. I walk old skidder roads to look for these but will also find them while driving main roads. Toms will usually drop a turd at a intersection, hill top or maybe a corner, it may or may not be with a scrape. With that said it is important to know the difference between coyote turds and cat turds and how each animal makes there scrapes. I also run cameras with a little RK Predator Plus to get the cat in front of the camera, most all cats i kill i have already seen a lot on camera. Don't get me wrong and think I get lots of cats, it's not a highly productive sport and I'm no expert by any means but it sure is a lot of fun and quite addicting.