I guess it dpeneds on what you would like to do.
Personally, I am bringing a cake topper with me, not worrying about extra decorations, have bought the fan programs from Michaels to use, and am considering doing small bags with different items my guests need as a thank you for coming (sun screen, lip balm, pills).
I think that the WC plans the ceremony, but if you want to add extra items into it, it may be best to contact her.