I would get a small spray botttle, you can pick one up at walmart in the shampoo/conditoner/travel size bottle isle. I would also get "fruit of the earth clear aloe," walmart also sells this.
If you get a short notice call:
Detangle your hair with the seamless plastic, or wood comb.
I would mist your hair, starting to first where you begin your briad.
Mist your hands, then place a dime size amount of aloe in your hands and rub together.
Braid your hair as usual, french or ponytail and english braid.
To make the french braid look more "done," you can bun the length at the base of your nape. You can also tuck the end of the braid up, under the rest of the braid.
You may want to try spin pins to secure the buns, or bobby pins, the same color as your hair. If you need them goody make smaller bobby pins, that are great for securing flyaways.