[Margaret Pilkington]

The other thing you have to bear in mind is :- if you consider them to be such useless bridesmaids, why would you want them to help organise anything........you wouldn't trust them, and if you did and things went wrong, your big day would end in tears.

Organising a wedding isn't that difficult.
Make yourself a list. Work through it systematically. And remember the saying....If you want something doing well....you'd best do it yourself.
Good Luck.