Hi abeni2,
It wasn't a "Duff Community" it was a town. My mother was raised their with her brothers and sisters. The town was made up of ex-slaves and native Americans, specifically Blackfoot, according to stories I've heard. Her family lost the town when the elders died and the younger people couldn't pay the taxes. They also had a cemetery is only for the Duff family. I'm planning a trip there this summer and taking photos. I am excited to see this place since I've heard the stories of it as a child.