we had 40 acres, we used 2, basically found the funnels and put em there. when they showed promise in a spot,we could follow em on the computer and actually get em down to the minute lol kinda like cheating, but when ya only got 40 acres, ya have to kill an animal in a such away that it dont leave the property, every advantage is good to have. you can actually block some trails and divert them to where ya want em... if ya try and block to many, we found they will just go around your blockage.