Hi Kaylene,
I would recommend an early morning appointment at the
Bibbidi Bobbidi Boutique which will ensure that you manage to get some lovely photographs in front of Cinderella Castle afterwards without the Theme Park being too crowded.
Appointments at the Bibbidi Bobbidi Boutique take approximately 30 - 60 minutes depending on which package you opt for and can be made by calling (407) 939-7895. (When calling to make your reservation be sure to request the Magic Kingdom location.)
If you would like to dine at Cinderella's Royal Table after your Daughters' transformation to beautiful Disney Princesses, I would recommend that you make an advance dining reservation for 2 hours after your reservation at the Bibbidi Bobbidi Boutique just to be on the safe side.
As your youngest Daughter will be only 2-years old at the time of your visit, i'm afraid that she will have to wait until your next trip to Walt Disney World in order to attend the Bibbidi Bobbidi Boutique.
As an alternative, perhaps you could consider taking your girls to have their hair done at the Harmony Barbershop instead on Main Street U.S.A. in the Magic Kingdom where they can have their hair done beautifully with an added sprinkle of sparkles and glitter! To make an appointment, you can call (407) WDISNEY or (407) 934-7639.
Wishing you a magical trip filled with memories which will last a lifetime!