To Everyone who Offered Directions so that we could leave straight from my Aggie's graduation for the mountains of Colorado:
Unfortunately we didn't get to try any of the directions from Aggieland to Amarillo and points beyond. The Aggie didn't make it to graduation....oh, we're pretty sure he graduated (in Electrical engineering! Woo-Hoo!) but he was still drugged up from the orthopedic surgery on his arm (4 inch screw and some "baling wire"

done Friday, and he wasn't exactly "fit", nor able to follow the orthopedic doc's orders to keep his elbow elevated and on ice during the ceremony.
The elbow break happened mid-finals in a basketball game so, of course, he didn't go to the quack shack until late Wednesday after his last EE final on Tuesday. Such heroic stoicism! X-rays revealed why it hurt so bad, and surgery was scheduled for Friday while the other graduation ceremonies were going on.
I brought his sore and doped up post-op self back to New Braunfels, expecting to turn around and head back for graduation the next morning if he was able and willing, but he was still pretty zonked. By noon we figured he could sleep in the car under an M.D.'s supervision (his dad) and headed for Colorado from here via I-10 (NOW 80mph speed limit, but then it was only 75mph!) to Ft. Stockton, and on to Roswell, Santa Fe, Alamosa, etc.
Thanks for all your suggestions....it would have been nice to have been able to follow them, and maybe someday it'll work out that we can!