Do you consider to Use Two Cameras and a Second wedding Photographer?
Beg, borrow, hire or steal an extra camera for the day – set it up with a different lens. I try to shoot with one wide angle lens (great for candid shots and in tight spaces (particularly before the ceremony in the preparation stage of the day) and one longer lens (it can be handy to have something as large as 200mm if you can get your hands on one – I use a 70-200mm).
Having a second backup photographer can be a great strategy. It means less moving around during ceremony and speeches, allows for one to capture the formal shots and the other to get candid shots. It also takes a little pressure off you being ‘the one’ to have to get every shot!