You don't want to be backstage. Trust me. I was on the guest list for the band Simple Plan a few weeks and backstage 'life' is boring. Like others said backstage area doesn't mean dressing room(I heard Bon Jovi allows no one, not even guests of the band, near the dressing room within an hour and a half of showtime), basically it means you get to try to avoid getting in the way of an expensive production.