Mean Girls questions

We were there on Sunday night of St Patrick's Day. We sat in the front mezzanine. There was a large group of high school age students in the rear of the mezzanine. We heard the usher going over the typical rules---no cell phones, photos, etc. Then she said (paraphrasing), "if you are going to stage door, you can not harass the actors, if you do so, you will be asked to leave"

The group was pretty rowdy most of the evening, it was typical reactions to the show and kept in the spirit of the evening.

As we left, the stage door area was already a mob, several people deep. We turned and went the other way. :)

There's no solid answer to either of your questions. No particular night is better than any other for catching the entire principal cast, so there's no way to guess at it.

As for stage door, again, there's no way to really know. It depends on how everyone is feeling that particular performance. Grey and Taylor are the most frequent of the principals to come out and sign, but sometimes you will see nearly everyone (do not count on ever seeing Barrett), and sometimes you will see no one. Just like any other show.