Every time I am trying to think of Yellowstone Park, I think of Jellystone Park first. I also kept trying "Old Reliable" for the geyser, which I now recall was the name for my father gave to our indomitable 1988 Dodge minivan.
He was lucky to get a reliable van. Those, and most everything else manufactured by Chrysler in the 80s were junk. Unless that nickname was sarcastic...
Advice to travelers: Never leave Yellowstone by the east entrance and decide to drive to Cody to spend the night. It's a terrible drive in the park after dark, and because there is a rodeo nearly every night in Cody, motel rooms are priced sky high in the summer. It's a small town in the middle of nowhere, so you're pretty much at their mercy. We paid $189 for a room at the Super 8 and were happy to find one at that price at 10 pm. Some ordinary motels were asking nearly $300 for a regular room.
Back when I was young, I'd go into the motel and ask how much it was. If it was more than $50, I'd counteroffer. If that was refused, I'd sleep in the car.