When I fall hunted with my dog and without we'd try to find known feeding and water holes in the George Washington Forest in WV mountains. We'd walk through those areas until afternoon and then go find water or a known feeding area and take a break (sometimes napping). I have killed many birds in the afternoon sitting in grapes or wild cherries. Around dark we'd try to be near an area where they roosted and listen for fly-up and chatter. If we heard them go up we'd flush them in the dark and head back there next morning. We'd Listen for the most vocal caller after daybreak and one would go there and try to get that bird or flush it out of the area while the other remained near the original flush site. If you don't mess with the vocal caller chances are most of the young birds will go to her and disappear. Don't know how they can disappear but they can.
We'd call loud and often using kee-kees and yelps.