Any chance of any trouble at all I'd go for a pair of knuckle dusters and some running shoes.
"If the radio tells you to go to a disturbance at a wedding - don't go" old coppers saying.
It'll be a bloodbath. In a fight in a bar only the few involved join in; but at a wedding everyone is someones brother/son/uncle/daughter....
And if feelings are so high they'll start fighting at a wedding.....
qjs