Have you checked the Dawes Rolls? There are many Bennett's there. Just type Dawes Rolls into your search engine and it will take you there. Then you can go through the lists of names and tribes. Since you're searching for the Bennett name you might want to try to find out if there is a connection to the Tackett name as well. Also consider researching the Melungian. They were of mixed blood races, including freed black slaves, Indian, white, and others. Many white people were there with their mixed race families on the trail of tears. I hope this will help you. There have been many records destroyed as a matter of course if it was thought that there may be "Indian" blood in the family blood line. I sure do wish you the best! :)