If you're working wardrobe, you will get to know the artists (=singers) in a much more... profound... way. You'll observe them vocalizing in their dressing rooms, going through superstitious pre-show routines (in my experience, way weirder than some things actors used to do), and concocting bizarre herbal throat coating teas at the coffee station backstage. You'll learn who are the divas - insisting that the designer is purposely trying to make them look terrible, and the lovelies - ready to go with the flow and laser-focused on their vocal performance.
Definitely stay aware of the backstage rhythm. The SM calls 5-minute places calls, which is rarely done in other disciplines. Since opera tends to have scene changes and heavy backstage activity only at act changes, the stagehands have this brilliant intuitive awareness of when we're coming up on 10-minutes-to-intermission, etc. (And I say intuitive because 80% of the crew I've worked with truly never learn or remember the music, even after weeks of running. It's all that backstage sense of timing.)
Sometimes wardrobe pages follow the singers around with slippers, a dressing robe, and/or a glass of water. But I doubt this will happen in college opera. It is usually reserved for the uber-divas at upper level houses.
The biggest thing about opera - and the thing that fascinates me night after night - is the push and pull of the stage action versus the music. Ideally they merge seamlessly, one element enhancing the other. In reality, the director and conductor - or more likely the singer and conductor - debate over music versus action. Can they sing properly lying in that weird position? Can they see the conductor? (If not, should the conductor just - gasp! - follow the singer through her coloratura?) Does the diva really always have to be DSC for the aria? No seriously - really? You might even overhear some debates in rehearsal where the tenor wants to transpose higher, and the conductor resists (maybe because the tenor doesn't really have the note); the soprano wants to hold her high note forever, and the conductor wants to push on with the music; the director wants the duet to be sung as the artists struggle against each other viciously, but the singers want to stand and stare at the conductor. Listen to these character-revealing debates. And then hold your breath to see what really happens in performance (will he push higher? will he crack? will she hold the note? will the conductor drown her out out of spite? will the duet begin with through-the-motions struggling and end as a park-and-bark?).
Oh what fun!
For a more entertaining take on the bloodsport that is opera, check out the smart and sassy blogger OperaChic at
http://operachic.typepad.com/.