I hen yelped back with a mouth call to the bird I heard, and gobbler yelped on a box to check the pulse of any in the area. Sometimes fall gobblers roost just slightly away from family flocks and other mixed groups. That's when the gobbler hammered back, roosted right along the river's edge, maybe a couple hundred yards away.
You heard right, a gobble to rival anything in the spring. And then another. Soon I heard hen yelping and gobbler yelping (more than one?), and of course gobbling.