i dont think Rock Candy Mountain needsparodying to make it distasteful. I quote from George Milburn's "Hobo's Hornbook"(1930. " 'The Big Rock Candy Mountain" , a tramp song, provides some excellent examples samples of trampfantasy. In many small cities and villages the children of poor whites use the railroad yards as their playgrounds. from these urchins the jockers sometimes recruit their preshuns, and to entice them they tell them roseate stories of tramp life. These fabrications are known as ghost stories. To the Home Guards 'The Big Rock Candy Mountain' may appear a nonsense song, but to all the pied pipers in on the know it is an amusing exaggeration iof the ghost stories used in recruiting kids."
Additional information on this aspect of the song comes from Mac McClintock's reminiscenses (the guy who claimed to have written "Halleluya I'm a bum" and "Rock Candy Mountain"). his final verse runs as follows:

"The punk rolled up hi s big blue eyes/And said to the jocker"Sandy/I've hiked and hiked and wandered too/ But I ain't seen any candy./
I've hiked and hiked till my feet are sore
I'll be God damned if I hike any more/ To be *************************/ In the Big Rock Candy Mountain" .

I'm afraid that line was censored out for publication but I think we can all figure out roughly what it was. Kind of interesting, especially given the contribution to this thread re keeping the site clean for young boys and their moms. Folk songs are rarely pure and never simple as Oscar Wilde very nearly said.