I would go with a single hen, because you can us it all through the season. Sometimes they like decoys and other times not at all. My hunt this past weekend I had a group of young males turn away from 3 hens and come within 10-15 feet of me just from calling, no deke. Then the Tom I killed actually was very apprehensive toward my decoy. But If I were going to buy just one decoy it would be a single hen. Heck that's all I got haha. But like Matagi said it all really depends. All 3 would be nice to have. Good luck hunting.