I will 3rd what they said. I just spent 4 days inside the park (3 on the shuttle buses) and the most wildlife we saw was between the entrance and teklanika (1st rest stop), sable pass, and then from just before toklat to eielson. We also heard stories of Moose and Wolves out near Wonder Lake, however we only saw birds and arctic ground squirrels between Eielson and Wonder Lake.