Not that this answers the orignal question, but... I don't think it's been mentioned, so let me state the obvious:
Whatever you do, rewind exposed film *fully*. *Don't* leave out the film leader. Just don't.
Leaving the leader out might work when you're out and about shooting landscapes, but under pressure it will go wrong. You will put the exposed film in the wrong box, pocket, or whatever, and end up exposing it again.
I'd like to assemble a Batman-like utility belt studded with pouches for MF backs and inserts, and add a bandolier for spare rolls of film. Might look silly at a wedding... Okay, it'd look silly at a Star Trek convention, but it'd sure bring out my inner dork.
Seriously, keep it simple. As others have said, fresh film in the right pocket, spent film in the left.
Originally Posted by df cardwell
And what if, like me, you can't discern left from right?
Don't leave the leaders hanging out of your exposed film.
Originally Posted by Dinesh
A nice black photo vest is perfectly fine for wedding photography. It isn't just film you carry in the pockets. Lenses, filters, cleaning things, even a flash or two can be pocketed. Oh, and batteries.
Originally Posted by clayne
They really are hard to beat and you only look dorky if you aren't carrying a camera.
One piece of advice which I will pass on. Make sure that any critical must have shot is done with two cameras. These days I shoot almost entirely hybrid so for me one of the shots is taken with the digital camera and the other with the film camera. But when I shoot only film, I make sure that the money shots are backed up on a second camera and roll of film.
Yeah, I know. No system is perfect.
Originally Posted by Dinesh
Then you need to do the bandolier/vest/utility belt route
and risk looking like a Royal Marine Morris Dancer.
Don't forget the Camo knickers and swim fins.
I wouldn't know what's available in the UK but here in the states the shooting departments of our sporting goods stores stock cheap canvas belts with elastic loops intended for 12 gauge shotgun shells. The loops easily accommodate the plastic 35mm film canisters.
The same stores also stock accessories for the trap and skeet crowd that include some nice belt carried pouches - sort of like a fanny pack - but with a stiff opening that helps the shooter get out live rounds and drop spent ones with out looking or fumbling to open a flopping cloth pouch.
There's really a great deal of commonly useful gadgetry between the firearms shooting world and the photo shooting world.
Maybe the Rollypoly line of hip pouches? I have a number of Maxpedition products and they are all military grade, very very tough stuff.
I've shot the wedding! I am quite happy with the results if anyone is interested, full write up and critique request here: http://www.apug.org/forums/forum292/...ml#post1018083
I used the Pro 800Z, 400H and Acros 100 in the end.