Here are some ideas for Daughter/Father songs for your wedding:
I love the song "I'll stand by you" by The Pretenders. Take a look at the lyrics to see if you agree.
A friend of mine always said that she would use "Landslide" by Stevie Nicks
The song Daughter by Loudon Wainwright III is now best known from the "Knocked Up" soundtrack. It's not too fast, not too slow, and it honors allthe things Dad has taught you.