This justs sounds like typical turkey hunting, some days it's a walk in the park, other days it's frustrating...if they are coming out to the field you are hunting in the AM, you have a great chance of killing one. I'd try putting some more hen decoys out, along with a strutting gobbler decoy, if you have one.
Another option, if possible, would be work your way through the woods as quietly as possible, and try getting in front of them, eventually they'll go back in the woods, and if you are set up in the right place, you may be able to ambush one. No, it's not as fun as calling in a gobbling bird, but it may help you fill a tag.