Church Anniversary Sheet Cake Cake Ideas For A Vow Renewal And Anniversary Celebration?

Cake ideas for a vow renewal and anniversary celebration? - church anniversary sheet cake

Hello. My husband and I have a small cermoney renewal of vows / blessing of the church and our 10th anniversary next 29 August. I want a cake, but I really have no idea what is appropriate, that the letter say - there should be a photo or a drawing or Cake Topper?
Our colors are purple, lavender, black and white. Any body have suggestions or a great design? If a cake or leaves a "double-decker cake should be?
We probably have 20 people, the dinner after the ceremony part.