I hesitate to post this, because it's not a particularly good cover... but for completists, I stumbled across a 1982 live cover of Wreck of the Edmund Fitzgerald by NRBQ. It was their final song of the night, and they do not take it seriously
at all.
I'm not going to post a direct link, I'll send you to where I found it, on the ROIO archive of various live recordings.
http://bigozine2.com/roio/?p=2763
-Andy