Wrote this as a comment; decided to post it here too. 2024 eclipse is less than a year away!
I am aware that I got very, very, very lucky for the 2017 eclipse. See, I'd planned to go to Yellowstone in 2016, but wasn't able to find hotels in the park when we were free for a vacation because it was only 8 months in advance, so we rescheduled for 2017, and I just happened to book a flight/hotel room in Jackson Hole Wyoming for the day before we were going to Yellowstone... and that just happened to be the day of the eclipse, which oh yeah was going to be total in Jackon. It was
amazing. The traffic before (and after) the eclipse wasn't
that bad for us - but I have cousins who live in Chicago, and who travelled for the eclipse... and they ended up getting home
really late. As in 3am after the eclipse, due to traffic. To be quite honest, for us the
start of the eclipse was interesting, and it was cool seeing the bites out of the sun get larger and larger... but, well, xkcd had it right:
https://xkcd.com/1880/ - total eclipse was so amazing that afterwards we didn't wait for the partial eclipse to finish before driving to Yellowstone. My wife Joy spent a lot of time finding reputable sellers of eclipse glasses beforehand, although they were giving them away in Jackson on the day of. I second the warning that the time of totality will go by faster than you think it will. Unless you're interested in the camera tech, it might not be worth it trying to take pictures - these are not typical conditions; being aware of the moment and taking it all in was about as much as I could deal with. Depending where you are, it may be good to have an extra warmth layer for the eclipse - the temperature drop was noticable in Wyoming even when it was partial. (Your eye won't notice a difference, but there is less light and it may get cool - it was wacky seeing the automatic headlights turn on in the cars)