I agree scouting is probably your main tactic for the fall.
I haven't hunted wild turkey during the fall mainly because I think it will be too easy for me as I see them frequently around my place.
Once you have patterned the birds you can ante up the hunt as Phil did and try scattering them, then call them back, unless of course you just want to get a bird and shoot one as they come along.
Food is their main concern as the fall comes along so any of the newly harvested wheat fields should offer viewing and a good chance to get one.
Don't forget to pattern your gun and shoot only within the 30 yards range for a clean head shot.
Where there is still a lot of cover be very patient as they are very wary in going out to the open.Usually it takes them a long time to just pop out from the edge.
If you see a flock go out from some corner of the bush, try and go there without being busted. Don't mind the ones already on the field. Wait for others that will be using the same entrance to the field. Also the ones on the field will likely come back exactly the same way as they have came as they know it was safe there before.
Good luck and safe hunting....