I've camped at Yellowstone. I highly recommend going there. It's one of the most beautiful places in America. I'll never forget all insane amount of scenery and wildlife we saw. In fact, bears are known to come into campsites, which then, people start banging  pots and pans to alert everyone that a bear is in the campsite. Cray I know, but kinda cool in a weird feeling a part of nature sense.

But if you're going to go to Yellowstone in a rental car, you probably should make sure you have the correct insurance. I'm speaking of "bison" insurance. I don't even know if that's a thing. But by the sounds of these people...maybe it is.