PS: I would also consider a couple off camera, remote flashes....at the reception you could set these in the corners and bounce 'em off the ceiling for a fill flash that could work anywhere in the room. If you rent gear, get it early and check it all out so you know how to use it. You will want extra memory cards and batteries for sure. You can't afford to stop shooting. You may even have to consider a 2nd shooter, especially before the ceremony it's hard to get the bride and bridesmaids preparing and also the groom/groomsmen....they may not even be at the same place. An assistant can be valuable too to help organize everyone for posed pictures, hold flashes or reflectors, carry gear, run errands etc etc.. Don't know if the budget allows all this stuff but you should consider it. My son-in-law does this work frequently and my youngest daughter was married last summer so these are some things that I have recently been through.