Wow I would love to do this! Yellowstone has to be one of the most beautiful places in the United States. Just a bit too far from where I live.
Oh, you may want to warn folks to look out for wild life that often crosses the road, especially early morning and early evening. Many of them are as large as our cars and can do serious damage to cars and occupants. For those driving there, keep in mind that what may appears to be oncoming traffic flashing their headlights is often a herd of bison, moose or elk darting across the road.