The best thing to do is watch this site for announcements of auditions.
There are some general tips, however:
* arrive early
* be ready
* be confident
* be patient
Each director has different styles. Some directors prefer to post the cast list online and point everyone to that. Other directors like to call each cast member personally. In any case, the cast list will be posted to our website once the director has given approval to do so. We generally try to get the list posted within a week or so after auditions are closed.
That really depends on a variety of factors. Directors determine who is in each scene, and then try to group scenes/actors so that they can make the best use of time. For instance, if an actor is only in two scenes, they typically won't have to show up on nights where other scenes are rehearsed. Once the show progresses to a certain point, all actors are required.