Sounds lovely. I'm a Joshua Kadison fan from way back! Here are some thoughts...

Make sure you know exactly at what point each of you starts walking down the aisle, because otherwise you might have to wait for the first song to finish before you can start walking. In case you are printing it on programs or something, it's Canon in D by Pachelbel.

3 songs for signing of certificates seems long - we only needed 1. Is You Raise Me Up going to be your recessional? If you are finished way early is there a way you can signal to your sound person to skip 1 or 2? Or are you happy to sit there and listen while everyone has a little chat and comes and takes your photo?

Hope this helps, and hope your day is absolutely wonderful!