Tina had issues when the show was filming. Sounds like she finally grew up. Bob Denver once said (paraphrase) “Maybe she should have noticed it wasn’t called Ginger’s Island...”
That was her character. Completely self centered and I am the starlet. That Tina was that way in real life while on the set is well G. . . It was a 30 min. Sit-Com. Maybe she had limited acting skills and needed to be in-character at all times in order to film the scenes.
Bob Denver once said that Tina Louise and Russell Johnson (the professor) were quite the couple during shooting. Tina denied it but Johnson never did.
Denver said Johnson wasn’t making the trailer rock by himself.
I’m still trying to figure out why Ginger had so many full-length evening gowns with her for a three-hour tour.