I shot a long bearded hen about 12 years ago near Lake Darling. It was an 8" or 9" beard, but pretty thin. I have seen bearded hens since then, approximately 1 every 2-3 years. I had one stick its' head right in my blind about 5 years ago, but I have passed on them even though they are legal.
About 7-9 years ago I used to see one almost every time out, but I think it was the same bird. She had a long, thin beard too.