See if you can get your hands on a copy of his book about the WTC climb (and other adventures, including his early climbs in the Gunks). "Going it Alone" Dolphin-Doubleday, ISBN 0-385-14726-0.
Factoid - George's cousin was my son's radiologist.
The DT climb was after his WTC climb, and as I recall he took a fall that was ridiculed by some as "staged for the camera". He pulled up several feet of slack (he explained later that he did it to deal with rope drag) and promptly fell off.
I didn't know about his climb of Devil's Tower, but I did watch him climb the west face of the Bastille in Eldo. It was broadcast live on ABC's Wide World of Sports. He clipped into pieces of pro during the commercials and began climbing again as soon as the commerials were over. They had cameras all over the place including one on a huge crane that they managed to drive up the narrow road west of the Bastille. It was quite a production.
It was quite a big deal to 'reveal' the climbing scene to the rest of the world back then on Wide World of Sports. I think that is where I first saw highlights of Warren Harding climbing El Cap waaay back in late 50's or early 60's. I looked forward to any climbing clips to see back then, being a confused midwestern child with urges that did not match my geography.
I was part of the film crew for ABC Wide World Of Sports coverage of George Willig and Steve Matous's ascent of Tulgey Wood on Devil's Tower. I do not remember George taking a fall on that climb. He did take a rather long fall on near the top of Angel's Landing in Zion. That leader fall was captured by Emmy award winning journalist and cameraman Mike Hoover on live prime time TV. Here's a link to an article that I wrote about that event. rockerwaves.blogspot.com/2011/02/blog-post.html
So it was tulgey wood a great west face classic!! Interesting fact about TW is that when the original FA was done it was only rated at 5.9!! I still feel the third pitch is the hardest 5.9 pitch on earth. Still would love to see the video of George Willig's DT climb.