Yup it is my experience that if you see them in a field as the sun is setting they are going to roost pretty close to the edge or along the edge in a tall tree. Usually they go back a little bit but when they pitch out they like to land in the field about 60 yds from the edge if they are close to the edge. Knowing that I would go fairly close along the edge a little ways away and set out a couple of decoys. They often pitch out then feed along the field towards another field or area. Watch them and pattern them for a good setup spot.