Hey Marie.in my own experience in receiving celebrity autographs,the best way is tio mee them face to face.
When I met Alice Cooper and the late Wolfman Jack & Fred "Rerun" Berry,they were all in regular places. The meetings however were just our paths crossing at that time.
In Lightfoot's case it's easy,just attend a concert and wait outside for he and the band and there's pretty much over 90% chance to get an autograph.
Gord autographed my copies of "Sit Down Young Stranger" and "Early Lightfoot" plus ticket stubs & other things. I even had my picture taken with him. He's not as difficult to meet 7 greet with as other celebrites are.
Heck,Gordon is nothing like a celebrity,thank goodness.