I hunt in Souther Wisconsin, and we have fields, and woods for the most part. What we usually use is likeyou said 1-3 decoys. What i have found is if you want them to get closer for bow, i would suggest using 1-2 hes for strutting to pull back on, do to the fact that when i am out hunting i never see a single hen during the moring. I like to use the single hen in the mid-late day cuz the toms have just lost their morning hens. But that is what i use in the spring. I have found only two ways to get them in the fall. One is the ambush, and the second is a bunch of decoys of any sex, just not teh "fired up" jake. thats because the turkeys in the fall are all grouped up for winter. good luck this year!