Hey, you're right up the road from me. I live in Floyds Knobs and my hunting buddy lives in Pekin.
I don't know of a growers association in Indiana but it might be fun to start something like that.
Do a lot of hunting in Washington, Harrison, Floyd, and Perry counties. The wild Ginseng in Southern Indiana is great.
dirtslinger to me ginseng is one of the easier plants to grow as long as you don't plant thick and then u have to deal with diseases. Just follow the instructions on this webpage and if your ground is suitable for seng you shouldn't have any problems, just remember don't plant to thick space them at least six inches apart. You really need to buy the book Growing and Marketing Ginseng and other medicinal plants by Scott Persons. You can find it on amazon, Harding's, and Ozark MTn webpages. It is really helpful to any ginseng grower.