First of all, I would never wait for 2 hours to pass before I started looking for a back up. If the DJ was 10 minutes late I would already be trying to get into contact with him and if I couldn't reach him I would already be working on a back up plan just in case it turns out that he doen't show. You should always have a generic background music track available just in case. Even if your DJ shows up, there is no guarantee that he won't experien