There is only one Indian Reservation in Texas and that is the Alabama-Coushatta in the Big Thicket area of east Texas.
Our “nice” native Indians were the Apache. The other two non-migratory tribes were cannibals the Mexicans killed off early on.
Tigua Reservation
The Tigua people live on a 26-acre reservation in El Paso County. The reservation is home to a 900-seat high-stakes bingo parlor, and visiting the gaming facility is the only way for non-Tigua to visit the reservation. The Tigua honor their patron saint, St. Anthony, by attending the annual St. Anthony Festival in El Paso. There they perform traditional dances, and members of the tribe interact with visitors.
Kickapoo Reservation
The Kickapoo live on a reservation southeast of Eagle Pass where they have built a casino (kickapooluckyeaglecasino.com). Tourists are strongly discouraged from entering the reservation unescorted, but are welcome at the casino. Although the casino has an Eagle Pass address it is technically on Kickapoo national land, and visiting for gaming is the only approved way for non-Natives to enter the reservation.
http://traveltips.usatoday.com/indian-reservations-texas-tours-60348.html