According to a fan magazine of the era, Mae West refused role of older carnival owner (ultimately played by Barbara Stanwyck) when studio refused to rewrite script so she would appear as one of Elvis Presley's love interests.
When Cathy and Charlie ride the Ferris wheel, there's a point of view shot. It's actually the view from the back of the seat, not the front. The Ferris wheel pulls the characters backwards and the Merry-go-round can be seen behind them as the sit down. If it were the point of view of the characters, you would see the framework of the wheel.