Visit the Zone of Death! Almost completely empty! https://en.wikipedia.org/wiki/Zone_of_Death_(Yellowstone)
Popular things are popular for reasons, after all.
The best I've found is visit at inconvenient times; early or late in the season, or early in the day.
But what would happen if/when a felony is committed in the Zone of Death is fairly clear. A local judge would rule that "State and district" needs to be interpreted in the intention of the legislature, and can only be "State or district" when those differ, since "neither State nor district" isn't going to lead to a "fair and speedy trial".
But this opens a wedge for appeal on procedural grounds, which any defense lawyer would be duty-bound to take, and the whole thing would end up in front of the Supreme Court. Which is a waste of everyone's time, SCOTUS should be creating meaningful precedent with its limited time, not futzing around with the one spot on the map where the Sixth Amendment is ambiguous.
What wouldn't happen is the perpetrator going scot-free. That's not how it works.
It's a cool name though. Very in keeping with the West in general.
Then went to Grand Canyon and Zion and saw they have shuttles which are sometimes exclusive (if the shuttle is operating you cannot take the road), which makes so much more sense, and even allows for more flexibility (you can go on a hike which is out, and not have to walk back the same way but hop on the shuttle bus).
There also tend to not be as many people driving around slowly gawking on the roads themselves (unlike Zion or Yosemite, say), since most of the park doesn't have crazy vista views, it's mainly a high altitude, flat-ish volcanic plateau in the middle. The specific sites along the roads will have the traffic mostly.
Also, as a photographer, the shuttle system is pretty awful. It's no longer easily possible to do get out to where you want to be well before dawn.