What a fun place to move! Surprisingly enough, we actually saw more animals in Banff (although we did stay there longer) than in Yellowstone. I loved the Grand Canyon of Yellowstone the most; a few of the lookouts there were under construction though, but hopefully they will be accessible when you make your trip. I also liked visiting all of the geysers and hot pools later in the evenings, you avoid more of the crowds that way. Yellowstone is such a unique place that you just have to see it. Excited to hear about your upcoming trips as well!