based on my sister's planned wedding...
definitely have it in early January, because everyone has loads of spare cash at that time of year.
decide that there will be no alcohol at the wedding (because you approach religion like fashionista's approach skirt lengths and Islam has currently replaced Judaism on the 'what's hot' list. note: our family are lapsed Catholics).
decree that there will be no music at the wedding, even though you are a dancing teacher and have always gone on and on in the past about how a wedding just instead a wedding without a ceilidh band.
Instead ask your ten year old nephew if he could bring along some of his board games for hours of entertainment. All the (completely) sober adults will really enjoy playing jenga.
Decide that your nephews must wear kilts to the wedding, even though the groom will not be wearing a kilt. Do not offer to pay to deck out the children in kilts.
Book a really big venue, even though you've decided there aren't going to be many guests (possibly because you've realised that no one is going to want to come to the world's worst wedding). It's crucial that you ensure that this venue has a large open fire (preferably two) so that your sister can spend the whole day ensuring that no toddler nephews are incinerated.
Tell your sister that you are going to ask the caterers to make a special dish composed of broccoli, sprouts and cabbage just for her. WTF?
I'm pretty certain that there will be hours of photographs to be endured with no alcohol and no food, and grumpy, hungry, tired toddlers will be required to participate.
Obviously, I'm really looking forward to this event...