I've skimmed through the above episode and 3 others and it's not as iconic as I thought it would be. It's a lot of shacks, feels barren and mostly lackluster until you reach the Grand Canyon. A collection of grey beards with bad teeth await you at several of the stops but I guess that adds to the authenticity of what looks like an ole western town effect.
Now, I didn't bother to look at all the episodes in real time, in detail but just speeding through it, the images were underwhelming.
Based on the above documentary, it's not something I'd want to do. I think I'd just go straight to the Grand Canyon and skip the tumbleweeds.