One of my favorite childhood memories is a 2-week family trip in our motor home through most of the western states. How my parents made it with six girls, including an infant, crammed into a motor home for 2 weeks, roaming around the country still stumps me, but it really is a great memory for me!
We had one ER room stop for the baby (it turned out to be nothing), a flat tire in the middle of Nowheresville, Nebraska, on an endless stretch of flat highway, with 1/2 box of Ritz crackers for all of us, and, I can't think of a third catastrophe to add to the mix, but maybe that's a good thing.
Yellowstone National Park with all of the animals roaming around is a very vivid memory for me. I look forward to my children getting a bit older so that we too can take some of these memorable and educational family trips.
However, if there are no animals to see, Yellowstone will be a completely different experience.