Welcome to Shoshone, the world's shortest permitted run!
If I had to pay to run Shoshone, I'd certainly want to run it two or three times, as opposed to one or two, occasionally three.
More runs per person=more congestion, more shuttle runs, the same people getting frustrated by parking more times per day.
Even if there were fewer bodies, there would not necessarily be a significant decrease in traffic.
"Believe me, my young friend, (said the water rat somlemnly), there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats. Simply messing...." -The Wind in the Willows