The Central Electric Railfans' Association covered the event with ample photography.
Let me direct your attention to one picture of the excursion train at the current Dempster tail track, which used to be the North Shore Line's southbound main track.
Central Electric Railfans' Association archive photo.
Look closely at the structure to the right. It's a bus loading platform. Rather than put up the usual minimalist glass boxes, the Transit Authority installed a roof and lighting that recalled the original Rapid Transit and North Shore station that once stood here.
Opening day at Niles Center.
The loading platforms in the background gave way to parking spaces, and the station building was moved to the east and re-purposed. The crowd is standing on the future site of the tail track, er, North Shore Line to Milwaukee.