Steve Martin wrote a letter to the Barstow family saying that he is "as positive as one can be" that he appears in the film at about 20:20, selling guidebooks near the park entrance.
Was selected by the Library of Congress for preservation in the United States Film Registry in 2008.
This film was shot in 1956 and first shown that year to friends of the director and at other events over the following years featuring live narration from Robbins Barstow, who finally recorded the narration in 1995 for the video release.