Have you seen these?
https://www.indiegogo.com/projects/instamic-the-smart-small-gopro-of-microphones#/story
The pro audio guys are very sceptical, but how many questions are in this section to do with how to get decent audio without hiding a zoom in a bra?

If the audio is as promised, this could be a real winner?

I like this idea. Not only for the bride, but would be an easy way to mic those giving toast. Very tempted!

I've ordered one to see how it goes. But I'm still hoping the Juiced Link Little Darling will answer some of my audio prayers. Lav mic will surely yield better sound than the Instamic, and backup track at lower level is very attractive.