July hair help needed

my wedding is next july. i really want my BMs to wear their hair down. we all have long hair and i want big romantic curls, very natural looking. i want everything to look very fairytale and flowy. they are wearing chiffon dresses and i think their hair would look great.

BUT...
i am having an outdoor ceremony and CH. the ceremony doesnt start until 630 and we are going to take pics before.

im wondering if anyone can post pics from outdoor summer weddings with hair down. im concerned with humidity and friz what will happen!!!
TIA

3 of my 4 BMs wore their hair down - here is one pic. You can see some more in my album