You need a strict, minute by minute itinerary with no flexibility
You prefer a fast checklist tour that squeezes in every possible stop
You want long hikes or physically demanding trails
You must be back by a hard early time or prefer not to be out for a full day
You expect guaranteed wildlife sightings rather than natural possibilities
You need step free access at every stop (most stops are easy, but a few include uneven ground or short trails)
You prefer a tour that focuses only on Mount Rushmore and nothing else in the Black Hills