I was having some problems too. Always saw hens, and when I did see gooblers they would stay out of range.
I read an article that said late season put out more decoys. I put out 5. (only had 2 before) Seemed to work. Came right in. Actually one Tom knocked over my decoy. I started whisteling to try to get him to strech out his neck, I mean a lot, he just walked off puffed up. and I had to take a long (40yd) shot. Fiocchi #5's are killers. Have him in a stew tonight.