Originally Posted by markbarendt
Typically weddings are hurry up and wait affairs. Just load during the waits and have enough backs to get through each hurry up.
If you know basically what shots you really want in each hurry up and when they will be, you can plan for that plus a bit extra.
I got along fine having 4 backs to instantly put on my ETRSi, and loading new rolls of film during the many 'waits'. Having 220 rather than 120 further eased things.