Hi Highland Lass,
I found a web site that might be worth looking at. It contains Scottish wedding traditions:
http://www.siliconglen.com/Scotland/12_9.html
I was married on the 15th of August too!!
In case you don't find anything suitable, why not buy him a signed copy of my debut cd which they say is "an absolute treasure for any fan of Celtic languages and culture" (
www.tradivarium.at)
You can hear some sound samples at
www.brid.at
Adh mor (Good luck),
Brid