As much detail as possible. The time your hair and make-up are arriving, leaving for the ceremony, ceremony time, space for confetti & photo, meal, speeches, and anymore information you may have been given by your venue.
Please try & keep this list to a maximum of 6 shots, 8 people per group. Believe me when I say that they take longer than you think & you don't want to spend your afternoon posing for 20 group photos!