Know ahead of time what kind of conditions you’ll be taking pictures in. Can it be an outside wedding at midday? A dimly lit church? Additionally, you might also want to take a position in mobile chargers or more batteries to hold you thru a twelve-hour day of taking pictures. https://docs.google.com/forms/d/e/1FAIpQLSc36JHuu4MYTrkejfqFJeRoAtNXUXbIHdL2ZvFr8tCyiHer-A/viewform?usp=sf_link