I have a large, extended family - first cousins and some great-aunts/uncles who I am very close to, I saw most of them at least once a month while growing up. They are mostly located around Lincoln/Omaha Nebraska, where I grew up.
FI has a small family, and they all live within about 30 minutes of each other outside of Denver, where he is from. Currently, we are living with his parents to save money for a house/wedding/etc.
I was not one of those girls who had eeverything planned about her wedding, but I had always imagined getting married in my home church in Lincoln, where my parents and grandparents were married. The problem is that it is unlikely his three living grandparents would be able to make it back to Lincoln for the wedding. On the other hand, I have a few great-aunts/uncles who would not be able to travel to Colorado, and it's hard to imagine them not being there either. Also, less of my extended family in general would be able to make it with travel and such.