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Polyamory.com » Online Poly Resources
Since there really is no specific "poly lifestyle," and it's all about how you incorporate multiple loving relationships into your own lifestyle, it's possible that if you pursue things you enjoy, and socialize frequently, you just might run across people who are open to it, perhaps where you least expect it. I have also read, that another way to possibly find people is to associate with or join clubs where other alternative practices are accepted, such as co-housing, food co-ops, gaming, RenFaires, BDSM, Burning Man, nudism, sci-fi, Unitarianism, intentional communities, ink and piercings, New Age and other "spiritual" philosophies, etc., where more free-thinking people will be found. Now, I know the Deep South is probably short on most of that, but maybe you can at least find folks who are involved in liberal politics or into the arts -- that might lead you somewhere.