Chris, back a few years in TBM, Al Herrin did a regular column on growing up in the Cherokee Nation and his life in archery.
You should also check the sponsor listing for Pine Hollow Longbows; Mike Yancey is right down the road from you in Van Buren, and he stocks a number of books about Native archery and history. You may need to give Mike a call, he doesn't have everything listed on the website...or you could just go down and visit...
Also, as close as you are, you could call some of the agencies in OK and see if you might get some names of living archers in the Nations that you could contact to interview...that could be a real trip....
good luck
Kevin