LOLOL!! My parents and grandparents drove out there in 1966 and it was such a bad experience for my mother, as she is afraid of heights, I think she made some kind of pledge to God if he would get her out of there alive, she would never go back again. She is the last living person on that trip and she has held up her committment. She will NEVER go back..lol.
There was a stopping place I remember. I refused to get out of the car as I was still in hysterics. I remember telling hubby that I was not going back or forward, to just leave me there as I refused to continue.
After a bit, he did convince me to proceed and continuing north it was not as bad, but at that time, I was laying on the floor in the back seat as not to see anything.
Yellowstone was beautiful, but there are just some places not worth seeing.