"I think the things I wanted answered have been answered by people in the know that we can't talk about, so I'm perfectly happy with how Chewie came to be where he is and what is going on in Episode III"

This quote by Peter Mayhew suggests that he is satisfied with the way Chewie's story has actually been told in Episode III. He suggests that he has received responses to his concerns from people who are not allowed to be talked about, recommending that the answers he has received are private. This implies that the responses he has actually received are satisfying and that he is content with the method Chewie's story has been told in Episode III. It is most likely that the answers he has gotten relate to Chewie's backstory and his role in the movie. This quote reveals that Peter Mayhew is confident in the method Chewie's story has been told and enjoys with the outcome.