I am trying to plan a 16 day trip for my husband and 2 adult children. We are not rver's, so we will be needing lodging along the way. Mt. Rushmore, the badlands, Yellowstone and Grand Tetons have made the list of destinations. However, I am trying to get as much in as possible since we are out that far. I suggested Glacier National Park, is that too far out of the way? Would it be better to head to points south of Yellowstone when we are done there. Also, how much time to allow for Yellowstone. We will need to drive out of the park for lodging each day since I am told lodging in the park is booked at least one year in advance.