Just spent 6 days on a backpack hunt with a buddy. Bulls were still running together and showed no interest in a cow call at all . . . when we could find them. Full moon kept them feeding after dark and before light except for a couple occasions. Tried calling at night, but they weren't talking at all. Hunted hard and my buddy blew a stalk on a 280-ish bull. Tough stuff. Headed back next weekend when hopefully the bulls have started to heard up some cows.