We are going to visit YNP and GTNP for 3 days in two weeks with 2 children (5&13) . We'd drive from Salt Lake City to Jackson Hole and stay there for one night. Then we'd go to GTNP and enter YNP through South Entrance we'd stay at West Yellowstone for two nights. After then we would stay in Gardiner and leave on next moring to Beartooth HIghway (is it nessarary?) and drive back to Idaho Falls. Anyhow, children are eager to see wild animals, so is that much animals to the north of the park? And after browsing the different geysers and springs etc., are there any recommendation for such those scene? Thx!