Just in case I can't contact you when I arrive.
Photo with all guests
The best way to do this is to have a celebrant announcing that there will be group photos so guests don't walk away too far. Please assign 2 helpers to round up everyone to the photo spot (I will let you know where it is on the day). This is generally someone who knows the bulk of the guests, and isn't afraid to be strict in rounding up everyone quickly!
Family photos will be done right after the ceremony (or let me know if you'd like it differently). You will need a further 15 mins or more for family photos, depends on the number of groups. I recommend having a maximum of 10 groups. Please assign 1-2 helpers to gather family members in and out of photos. I will bring this list on the day and give it to the helpers.
Please includes timing for all formalities. Entrance time, cake cutting, first dance, speeches, etc.