The Bus Driver is the person who drives the `bad boys' to Camp Green Lake.
In the novel, when the Bus Driver was done driving Stanley Yelnats IV to Camp Green Lake, he said, "Welcome to Camp Green Lake. Be careful." However, in the film, he does not say anything, even when Stanley said, "Thanks for the ride."
It takes 8 hours to get to Camp Green Lake, but according to the novel, it was "Nine hours here, and now nine hours back."
In the film he is portrayed by Jim Wilkey.