I've been watching this "trend" gathering pace in the USA but have yet to see couples over here grab hold of it.
An unplugged wedding is one where the couple tell their guests to leave all their "devices" at home ..... no cameras, no i-pads, no videos, no mobiles, etc. Its done not so much to aid the official photographer/videographer but to ensure that guests not only enjoy the wedding but play their traditional part in the wedding.
As a pro-photographer of ten years plus, I have no issues with guests shooting weddings in terms of competing with me but I do see so many weddings that really struggle because literally dozens (sometimes more !) spend most of the day taking photos instead of interacting with one another and playing their part in the wedding itself. I've not only seen parents with cameras but the bride and groom too and, on one occasion, even the vicar was taking shots DURING THE SERVICE !
Would be interested to hear whether anybody is planning anything along these lines and also, if you have already had your big day, how did you find being exposed to so many cameras !
There's an article on unplugged weddings at https://offbeatwed.com/unplugged-wedding/