well turkey's usually are very easy to pattern, and they are going to visit that spot consitently until the food source has run out at that location. Then they will gradually change their pattern to another feeding place. But since you saw them just before sundown, probably means that they are roosting somewhere close and that location will probably never change.
I have birds that roost at the same strip of trees since i can remember. so it looks like you will be able to see where they roost and now you can move in and get an early bird when you go hunting.