Hello lovely folk...
I am stressing... LOL... I made a late decision to stay over Saturday night after all, as I'll be on my feet all day, concentratinge tc and was worried I'll fall asleep on the M4 on the way back, so found a cheap as chips B&B in Aylesbury. I have to make a list of the types of images Booky wants, write down the ushers who's job it is to herd the masses on my behalf... charge all three cameras (probably overkill, but I'd never forgive myself if I had some sort of technical fail and no back-up!), take spare SD cards, ...
Have to drop the dog with a friend for the day. My new best friend the Sat Nav will hopefully get me there and I should have a good 3 hours beforehand to be able to check out both venues... I never like when I haven't seen the venue beforehand, had a bit of time to ponder light sources, angles, do a bit of experimenting. I also need time to chat to the vicar beforehand to introduce myself, and to see when they do/don't permit pictures... quite often they have bits during the ceremony when they allow photos and bits when they don't, and that's at the discretion of the vicar.
At some stage I'll have to nab the ushers and give them a list of groups to herd... I can't wait until the formal group stuff is finished and I can get on with what I'm best at, the fly on the wall documentary stuff. 
** wibbles **