The standing room only areas are located above the 400 level seats in both the East and West endzones. These viewing areas will have some of the furthest views available in the stadium, and will only be able to see the smaller endzone facing videoboards (which are still significantly sized, but are much smaller in comparison to the giant sideline facing videoboards).
You will want to get to the stadium as early as possible to secure the best spots in the standing room only areas. The stadium concourse plazas will open two hours prior to the 5pm George Strait concert, but the seating and standing areas will not open until 4pm, so we recommend getting there well before 4pm to have the best chance at finding a spot near the front of the standing room areas. Unfortunately, the views will be very limited if you find yourself behind other fans in the standing areas, so the high demand front spots will fill up quickly.