I have no way to confirm the date of this, so I’m making a guess. The WEDWay PeopleMover opened on July 1, 1975, and I don’t look to be much older than two years old in this photo. That would have made mom 27 when it was taken.
Mom looks shockingly like my little sister in this picture. If anyone reading this knows the date of this visit — dad? — please let me know.