Will there be anybody involved that you don't need photos of? I'll always aim to photograph everybody but if there are specific people that are less important to photograph please let me know. If this doesn't apply, just write n/a or something similar.
This is a good spot to put any specific shots you're hoping I capture, places in the venue I definitely should or shouldn't go during the performance, or if there is anything about your event that would be helpful to know in advance. Please note, that I cannot guarantee specific shots but I will always do my best to capture anything that is asked for.