I like every one of your ideas for the wedding,
Foley - just let's make it grain instead of rice, ok?
And my new character, Eodwemer, can serve as the wedding solemnizer, being the eldest person present.
One question - do you want the riding romp (in which the wedding pair have to outrace everybody else) to happen before or after the dancing and riddling? By the by, if the chasers can be on horseback for the chase, then the best man and best woman must serve as rearguard. This could be fun!
EDIT: Oh, and let's make it a circle as they didn't have churches with aisles.