Time between wedding and reception

We am gatting married at 1:30 ( we'll get out of the ceremony around 2:30) and our reception is at 6:00. We did that because I want alot of time for pictures. What can I do with our guests in that time.

We'll do the groom and ushers, groom with his mom, brother, father, grandmother at the church beforehand. He and I are not going to see each other beforehand, so I'll probably get some of me and my family at the hotel beforehand. If any of the other key people arrive in time, we'll alert the photographer, ie: the godparents, or the cousins, but we won't make a point of telling them to come early.