Hey Scarboni, I am not from Columbia, but I have looked around there a wee bit on visits to my son. I am going to be in some agreement with cbmyers22 and say that along the banks of the rivers and creeks, esp. the south and west facing ones right now would be good, but the prime thing I look for is the dead and dying Elm tree. My favorite areas are these and hillsides over bottom areas with the right tree's here in the Eastern Ozark foothills.
I used to kayak the Jacks Fork river south of you guys around the Birchtree area and it was really good pickings along the banks/hillsides where the Elms were and so amazingly beautiful. You young guys are doing really, really great already by finding the blacks. It isn't everyone that does. Keep burning that boot leather, studying your trees and learning and you will very soon be master shroomers and we will all be watching you on Youtube...