I have a Jack Hudson album "Summer Days and You" (later re-issued under the title"Homecoming") with Lightfoot songs:-
Summer Side of Life Your Loves Return In a Windowpane          Love & Maple Syrup The Last Time I Saw her

Rainy Day People was on his Starlights & Headlights album

Perhaps GL will pick up one of Jack's songs some day. He does do the occasional cover I believe.