There was an article on riding the trail in the most recent "Adventure Cyclist" mag (i.e., before Feb 2020), the house journal of the Adventure Cycling Ass'n. (If memory serves, mickeg also wrote about it on this forum, a couple of years back.)
The writer in the Adventure Cyclist piece warned about dangerous weather--heat, and fierce thunderstorms with little shelter.
I had some exposure to the latter a few years ago, when I did a transcontinental ride. They were fierce indeed, and there was no shelter in the form of farm buildings or bridges. Happily, on this journey I was riding Hans, my 800 cc airhead, so I turned and fled several kms back east to the wee village of Interior (pop. 59). There, I took refuge in the resto-bar where I had just eaten lunch, and watched the terrifying glory of a Badlands thunderstorm from a warm'n'dry place.