Rent a Hummer limousine

I have a fairly large wedding party: six bridesmaids, one junior bridesmaid, one or two girls who will be flower throwers, and two boys who will be ring bearers. I'm thinking of renting a Hummer limousine so that everyone can drive to the ceremony with me, and then the whole wedding party can go to the reception in it after the ceremony.But I don't understand what to do with the grooms' cars if they drive their own cars to the ceremony, and how everyone will then get home after the reception.I guess I'm worrying too much about everything.