I am way beyone impressed! I only ever personally made one wedding cake, and that was for a small do of 36 people.
When I was catering, I would bake the cakes and take them over to a friend who was a GREAT decorator (didn't like her cakes, she used a mix). Decorating cakes, unless I can use rolled tinted fondant, is just not my forte.
In "The Cake Bible," Rose Levy Beranbaum takes the reader/baker through a couple of spectacular wedding cakes step by step.