Robin Williams In 'Van On Steroids'

In the new big-screen comedy "RV," Robin Williams plays an ad executive fighting to save his job. With lots of talk about quality family time, he tricks his wife and two kids into giving up a vacation in Hawaii. Instead, they pack themselves into an RV and hit the road. Everything that can go wrong does, and his family's resentment starts to reach the boiling point.

Visiting The Early Show on Thursday, Williams described the movie as "'Easy Rider" in the big one. In the van on steroids. Your larger vehicle."

While his character is trying to sell the vacation as family time, he's secretly more concerned with his job. "It all falls apart because he's saying, 'I want this to be quality family time.' In reality, he's conducting business and starts up with his laptop and trying to get a Wi-Fi signal in the middle of nowhere," he said.

Williams describes the family as "slightly dysfunctional." He joked with co-anchor Harry Smith about what it's like to be an off-screen parent to his 14-year-old son. "You walk into his room ... and it's like going to the war room," he said. "There's two computers working, he has his MP3 on. The computer has homework, four or five screens going, files loading, he's got music on, he's also on the phone to a friend. ... You feel like Rain Man."

He also remembers his daughter sending a loud, clear message about how dads are supposed to behave. "It was literally like, years ago I was reading a story to my daughter and she literally said, 'Don't do the voices, I just would like to hear the story.' I was like, 'I'm sorry, my little director.' 'Just keep it simple, let's stay to the story, let the story speak for itself. I don't need to have any additional stuff.'"

Smith asked Williams if there are plans in the works for a "Mrs. Doubtfire" sequel, but Williams said there's nothing in the works at the moment. "Everyone's asking it," Williams said. "There hasn't been a script yet that's been worth doing. They tried, but unless it's good you don't want to do it."

"RV" opens around the country on April 28.