You might check out Claudio Saunt's description of Hillabee Town in the East in his book "Black, White and Indian, Race aand the Unmaking of an American Family." If you have roots with Grayson family you might find Saunt's book particularly interesting. Mary Jane Warde's "George Washington Grayson and the Creek Nation" would also be a good source. Also be sure and check out Robbie Ethridge's "Creek Country: Creek Indians and their World" that has an excellant description of the CReek country in the East for the period between 1800-1815. I don't recall for sure if she has a detailed description of Hillabee like she does for some of the other towns but certainly her book is worth reading.Hillabee was a Tulwa (or tvlwv)which meant it was a "mother town" with a ceremonial square ground. There were also other towns, "sister towns" (talofa) associated with Hillabee that shared a fire with Hillabee that you might check out--Ethridge has them listed. As far as a description of Hillabee in the West goes, I don't recall if Saunt discusses it much in his book. But one place you might go is to the searchable digitalized version of the Indian Pioneer Papers at the Western History Collection at the Univ. of Oklahoma and enter Hillabee in the search engine for the collection. Be sure and also do separate searches for the variations in spelling of Hillabee--Hilibe, Hillaby, Hillibe,etc. because the spellings undoubtedly varied in the Indian Pioneer Paper interviews. The address for the Indian Pioneer Papers is: http://digital.libraries.ou.edu/whc/pioneer/
Let me know what you find! Good luck.