I avoid using male decoys during the last half of the season. Hen decoys are fine, though. In fact, I like to put out two or three for field birds. Last week, I had a hen come in and hang around the hen decoys for over an hour. The key to late season field birds for me is to find the field (more specifically, which part of that field) that they're using and focus my setups there. Sometimes, I'm lucky enough to find some decent cover to set up in the field edge, but I'm not above setting up a blind out in the middle if that's where they want to hang out. A lot of the birds I hunt roost at the field edges and pitch out 100+ yards into fields every morning, so there's no defined trail to set up on between the roost and strutting areas.