Slashing the Guest List

Colin and I were reviewing both of our guest lists this morning. One of the things we wanted to determine was who to invite to the ceremony as our chosen ceremony location has a maximum capacity of 200 people. The dilemna is my family alone already accounted for 200. There are a couple of options that we can consider when sending out invitations: ask people to RSVP for both ceremony and reception, send out invitations to both events in multiple rounds, or invite only 200 people to the ceremony. We're still figuring out what to do.