I always thought that wedding rules were the same everywhere.
I will tell you what happened at my wedding. I got married in Hawaii (I was living there and married a local) and most of my family was in NY and New England. So I opted for a small wedding. When I came down the alise there where only 10 people in the church.
Apparently in Hawaii the churches (for the most part) are kind of small, and the weddings are huge, 300-800 not unusual, so people only come to the church if they get a separate personal hand written invitation. No one told the mainland haole. Everyone showed up for the reception.
They give money as gifts but as I was not a local I also got 13 rice cookers I guess they had heard that I made long grain rice, so figured my new husband would go into shock. His friends also dropped by with raw fish about twice a week for months in fear for his diet.