Today, there is so much agmas nefesh at weddings and hurt feelings by both machatonim due to differing minhagim. Sometimes the damage is never forgotten or repaired. The main thing is not what happens at the wedding but rather how the choson and callah treat each other afterwards.
For Instance:
Engagement- Erusin
Engagement Ring
Marriage license-Kesuba
The wedding canopy-Chuppa
Bridal flowers; Wedding ring
Throwing rice- A minhag from Talmudic times
Dancing with the bride- Mitzvah tantz
There are others customs, but the point is made. Most holocaust survivors met and married in DP camps without any fanfare or minhagim, and with almost no divorce.