Comparison
Yosemite or Yellowstone
Two of the most famous national parks in the USA that share little more than the first letter. They lie far apart, so usually only one makes it into a trip. Which one suits you?
Überfüllt sind beide, da hast du dir genau die besucherstarken Parks rausgesucht, bei denen sich die Massen eben nicht verlaufen. Im Yosemite knubbelt sich alles im Valley und am Glacier Point, im Yellowstone gibt es Mega-Stau, sobald sich irgendwo Büffel, Bären oder Wölfe nahe der Straße zeigen.
From the USA-TALK.DE forum
In short
These are two completely different experiences. Yosemite if rocks, waterfalls and a California road trip appeal to you. Yellowstone if you want natural phenomena and wildlife you will not find anywhere else.
Combining both in one trip is possible, but the distance costs a noticeable amount of time on the road.