The better of a caller you are, the less need of decoys you will need. If youre just a mediocre caller, I would just use one upright hen, a feeding hen and a jake. I have had more than one gobbler get hinky and hang up once they see the decoys. Also remember, turkeys will come directly to the sound of the call, so your set up is key. Its natural for the hens to look and go to the gobblers, but I make a gobbler frustrated and search for the hens or I just call hens in and let nature take its course. I use downed trees and thick areas as my blinds.