"The Yukon Song" is a poem added as original content at the beginning of Yukon Ho!.
Calvin sings the song while extoling the virtues of leaving civilization for the Yukon Territory. Like all original content, it was also featured in The Complete Calvin and Hobbes, on page 325 of Book 1.
The meter of the song matches "The Thing" by Phil Harris nearly perfectly. Skip the repeat within the song, and it lines up identically.
Well, I come from Alabama With my banjo on my knee And I'm bound for Louisiana My own true love for to see It did rain all night the day I left The weather was bone dry The sun was so hot I froze myself Susanne, don't you go on and cry I said, oh, Susannah Now, don't you cry for me As I come from Alabama With this banjo on my knee Well, I had myself a dream the other night When everything was still I dreamed that I saw my girl Susanne She was coming around the hill Now, the buckwheat cake was in her mouth A tear was in her eye I said, that I come from Dixie land Susanne, don't you break down and cry I said, oh, Susannah Now, don't you cry for me 'Cause I come from Alabama With my banjo on my knee