I noticed the name Concho Indians and realized that they are from the same area of what I beleive are my decendents the Jumano Indians, who before the Spanish came were all called the Plains Indians(with lots of diferent tribes each having a name). I also am interrested in this area and as I search I will watch out for the last names that you mentioned. The family names that I'm searching for are, Bustamante and Rede from Presidio, TX. Just recently I have added the Valdez name. Felicita Valdez is my great-great- grandmother. There may or may not be a connection, just fishing. Good Luck
Adela