If you happen to be in or around Custer State Park in South Dakota, you must take a drive on http://en.wikipedia.org/wiki/South_Dakota_Highway_87 - Needles Highway . I would suggest leaving the pod in the campground!

Upon our return to our campsite we thanked our campground hosts for the recommendation and told them of our adventures. Jim laughed and told us about the trailer that was stuck in that tunnel just a day or two prior to our visit. They pulled it out with a tow truck.

Yes, I am sure the "Student Driver" sign in the bus window is a joke. As he emerged from the tunnel, the driver rolled down his window and asked me, "Is this the way to Wall Drug?"

The last pic is of one of the many pigtail bridges along the route.