The screenplay was written by Arch Hall, Sr. (under the name Nicholas Merriwether), Joe Thomas, and Bob Wehling, and the musical director was a high school friend of Arch Hall Jr., the young Alan O'Day, who went on to #1 pop hits in the 1970s.
Note that the "Robert Crumb" who stars as Don Proctor in this movie is not the famed underground cartoonist who signed himself R. Crumb.