Factual error: In the scene when Baby is changing her clothes in the back of Johnny's car the lights and shadows in the car are moving in the wrong direction. (00:49:30)
Factual error: After the part where they were at breakfast and discussing the idea of leaving early, you can overhear the radio and the announcer says, "Oh, those Mets! What a team! Finally broke their 22 game losing streak!" The longest losing streak for the New York Mets is currently only 17 games, which was in 1962, a year before the setting of the movie. (01:00:33)
Factual error: Notice Baby's white Keds shoes with the blue emblem on the back of them. That specific style of Keds didn't come out until the 80s.
Answer: The father says they're leaving the next day, but when the mother asks why, he realizes he'd need to explain what happened, so he decides not to leave, and they stay for the rest of the trip as originally planned.