While it was a pretty relaxed experience, the most lively animal was actually an elk that approached Andrea's car and started chewing on the antenna. We had quite a few laughs about that encounter over the course of the trip.
In addition, checking out the bear cubs after our drive through the wilderness park was a definite highlight. They were pretty cute, and we got there just as they all started climbing up a tree at the exact same time (check out the video below). It was another worthwhile stop on our road trip through the Black Hills of South Dakota.