Sunday, 5/4/14, we did our tour thing.  First thing we drove to Medora ND and entered Theodore Roosevelt National Park.  It is a game preserve as well as a National Park, harboring 100's of Bison, Prairie Dogs & we were told a huge Elk herd (we didn't see any Elk).  We took the Scenic Drive, a 32 mile loop through the south unit, where we saw nearly a 100 bison in different places and lots of Prairie Dogs too.