@Nervousb2b
I'm not saying it will be a disaster, but it's not very well planned out IMO. I mean, 3 different venues, quite a few miles apart? Would not be for me.
The morning ceremony first, and then a 40 minute drive to the pub where you're having the meal (what's that, 25-30 miles?) At the meal, no-one will be able to drink, as they will be having to drive the 20 minutes to the third bit of the event - the night do. (15 miles or so?) And why no music?
I have never been to a wedding 'afterparty' with no music!
It all sounds a little bit like hard work to me, and like the day will be long, (morning wedding, so possibly need to be there by 10am or earlier? Then staying til midnight maybe?) Sounds a bit tiring. For the people who aren't staying at your venue, it will be a very long day! (In fact, it will be for everyone really, but worse for those who have to make their way back possibly 40-odd miles at night, after a 12-14 hour wedding!) 😬
As someone who has been to 2 'marathon' weddings this past 2 years. (Midday to midnight,) with big gaps in between 'stages,' I would not like this and would probably turn down the invitation. I would maybe go to the ceremony but not the rest. If you said all or nothing, I wouldn't come. Sorry. You did ask.
Two thirds of nearly 300 posters voting in your poll think YABU, (so far,) so it looks like quite a number of people think it's not a very good plan.
@idratherbepaddleboarding
I think it sounds lovely. Can people really not enjoy a nice pub meal without drinking?
Are you being serious right now? You would begrudge people wanting a drink at a WEDDING? A flippin' wedding?! 
Mumsnet never fails to disappoint when it comes to batshit comments!