I've tried playback a couple times on Virginias, Clappers, and once on a King and a Black Rail. I could get them to talk back but never "come out" for a picture. My best sightings have been staked out in a canoe looking over a mudflat at low tide, up a little creek path, or a place where the reeds have been pressed down. Also see if farmers will let you hang around the edges of the field while they are harvesting. Lots of things moving while the habitat is systematically eliminated. Check out the Yellow Rails and Rice Festival in Jennings, LA.