Southwest MO, huh. Tell ya what, I will be glad to swing by and do some theorizing of my own. I just happen to live in Southwest MO. Let me know where this place is--figure it has to be along either the James, Finley, Spring, or Niangua Rivers or Flat or Shoal Creeks...
Seriously, though---what these other folks have told you is dead on about changing habits dependent upon the year. Sounds like you have a solid roost area---those Missouri birds sure love a ridge along a creek and they love to pitch down into the fields first things in the morning during the Spring.