This would turn out to be actress Josephine Livingston's (Lili) only acting work in film or Television.
J Pat O Malley and Don Knotts worked together on The Andy Griffith show.
None of the roommates smoke, yet when Leo asked for a ashtray & matches, they were conveniently sitting right on the table next to the phone.
J. Pat O'Malley, who played Jack's uncle Leo, was an accomplished actor who voiced characters in several Disney films as well as appearing in over 100 TV shows.
The title is from the 1851 song "Old Folks at Home" {(Way Down Upon the) Swanee River"} by composer Stephen Foster for the Christy's Minstrels.