Collins greeted numerous guests in the booth during the race. Among those who stopped by were Chuck Stevenson, Sam Hanks, J. C. Agajanian, former (and future) radio analyst Fred Agabashian, Duke Nalon, Pete DePaolo, Henry Banks, Tom Binford, Johnnie Parsons, and Johnny Boyd. Indiana Senator Vance Hartke visited the booth, escorting a delegation that included Secretary of Transportation Alan Boyd. FCC chairman Rosel H. Hyde, Utah Senator Frank Moss, and Jack Kauffmann ("The Washington Star"). Senator Birch Bayh also visited the booth, accompanied by his teenage son, future senator Evan Bayh, who was attending his first race. On the air, Evan correctly predicted Bobby Unser would win.