A Goggle Search: Polk County, Texas Civil War Camps reveals only one:
Lookout, Camp,*** (Polk County) on the Neches River bluffs in northen Polk Co. (March 1862)
http://www.factasy.com/civil_war/alphabetic_list_of_fort/texas/l.shtml
http://gen.1starnet.com/civilwar/camps.htm
George Martin