I once read an article about a guy who was hunting a specific buck and his neighbor was also. They were competing I guess you could say. The author found a fresh scrape line from the buck. So the author made a mock scrape line a ways away from the actual scrape line so the neighbor would see it and set up on it. Well the neighbor did exactly that....and the buck came into the mock scrape and the neighbor got the buck. Touche I say. On public land I will not use scents, calls, etc. Deer learn not to come to scents and calls in daylight after the have been shot at a few times. Pattern the hunters in the area and stay away from them even if you are next to a highway, get aerial photos, and do a lot of scouting if your in your stand more than you scout your messing up . Do your homework and your won't need any of that extra stuff.