I took this flight last year. You can request an "official "World's Shortest Scheduled Air Service" certificate, when you land. It's cheesy but I treasure mine. Abusive comment hidden. (Show it anyway.)
Those drawings are fake (not attributable to either Lewis nor Clark). At the bottom of the page at this link are journal sketches of both men, who were talented sketchers. http://lewisandclarkjournals.unl.edu/read/?_xmlsrc=lc.img.corpus.04.xml&_xslsrc=LCstyles.xsl Abusive comment hidden. (Show it anyway.)