If I were you I would try 30p for the entire wedding.
It is a compromise between the the 24p and the 60i.
I would stay away from purposely creating two frame rates. During post one of them will have to be transcoded to the other somewhere during that process.
By the way, where during the wedding do you shoot slow motion?
John Lenihan
John Lenihan
LeniCam Video Productions
http://www.lenicamvideoproductions.com