One thing that I discovered is that kids may tend to get distracted if they see someone walking around with a camera. If it is at all possible, see if you can attend one or two of the rehearsals (with kindergarten, I know this may be a bit of a stretch) so the kids can get accustomed to you and you might be able to get some "behind the scenes" action. This is some footage that the parents won’t be able to get – you might be able to edit in the rehearsal footage with the actual production.
