I am having 100 guests at the wedding but I have been told that I shouldn't expect all of them to attend the ceremony. My ceremony is being held outdoors, 5 minutes away from my reception venue, and is supposed to start at 5:30pm on Friday (reception to immediatly follow after alloted commute time). Most of our families are going to be OOT guests but most of our friends will be from the surrounding areas. I don't want to not have enough chairs for the ceremony but I also don't want there to be 5 unused back rows of chairs either...is there a good rule of thumb for my issue or should I just rent 100 chairs and be safe?