On the 27th August 1978 I went to the Hollywood Bowl in Los Angeles, to see Gordon Lightfoot.
My journal records he "sang everything I knew and more". So I am thinking he probably played 'Canadian Railroad Trilogy' and 'Don Quixote' and definitely 'If I Could Read My Mind'. But I also reckon he played this: from the 1978 LP 'Endless Wire', the closing track, 'The Circle is Small', a re-recording of that song from his fourth album 'Back Here On Earth', released in 1968.

I hoped I'd find some actual footage from the concert, but alias not.
For the record my concert ticket cost me $8.75. ($1.86 = £1, back then).