My DJ says typically the prelude music for the ceremony starts 15-30 minutes before the processional. On the questionnaire they gave it asks what time guests arrive, as in when to start the prelude music. I'm confused about this? I guess people could potentially get there a half hour beforehand, but I feel like that's unnecessary? And also, how would you word that on the invite? Don't people just know they need to get to a wedding early enough to be seated? Or do you actually have to spell it out somehow?