Another option to consider is having a religious ceremony at home, a day or two before you go...we dealt with a somewhat similar situation (although it was not for religous reasons) from what I've heard, it is bad etiquette to have the official ceremony before the one that your guests are invited to without telling your guests that you have done so...but as far as I'm concerned, etiquette means very little - do what you want and need to do to have the wedding of your dreams!!! The only people who matter are you and your FI.