Halloween Wedding Ideas???

I need ideas for decorations, entertainment, cake, for an elegant, formal, october wedding. I dont want to do the fall leaves.... I want to make it look similar to a haunted mansion however not cheasey. Here is the trickey part though, Im on a budget!!! Im already getting married in a historic church, Historic reception site which helps a whole lot. So its not like I need to start decorating everything from scratch. I have my base. So I was thinking jack o lanterns, candelabras, candles, darker colors. My gown is a white victorian style ball gown. So it isnt gothic, I still want romance. Any ideas??? Please help me.