Yes, the Incredible String Band didn't make the film as a result of the Melanie incident described above (though they did creep into the repackaged re-release).

But the funniest Woodstock-associated song I ever heard was a parody of the Joni Mitchell ditty about NOT getting there. Written and performed by Andrew Paige, it was entitled "By the time we got to Neasden'.

(For the benefit of you transatlantic catters, for 'Neasden' imagine a devastated swathe of post-industrial Queens without the charisma).

How we London folkies laughed!