Weddingbee boards

We are planning to do a quick ceremony during the cocktail hour, has anyone seen this, done this or plan on doing this?

This is what plan for now, but still looking for ideas and have no idea how to word the invitiations?!?!?

Cocktail hour 5:30-6:30, ceremony starting around 5:45 lasting at the most 10 mins, then back to cocktail hour (all in the same location, which is a patio/gazebo area outside of reception site), then into reception to start around 6:45.

We are doing pictures before hand so don't need to worry about the timing for that.  I am sure people eating appetizers and having a drink before the ceremony is not appropriate in all situations but we wanted to keep the ceremony really casual and pretty much get right into the party.  But now that I am working on the wording for the invitations I have no idea how to write that.  I was just going to write cocktail hour begins at 5:30 with reception immediately following and just leave the whole ceremony part out of the invite but then wonder if people won't show up right at 5:30 if it is just the cocktail hour.

Any ideas or personal experiences would be appreciated!!!

Perhaps write "Ceremony and (with?) Cocktail Hour at 5:30" ? Then people know that's the ceremony too, so they won't mozey in late.