I have a big France Luxe claw clip that will hold like a rock, so I'd probably just twist a pony and clip it up, but anything with your hair pulled back would work. I just got a silk snood from Etsy that covers your whole head--I got it so I could work in the yard if the wind is blowing hard--but I don't suppose you have time to order one, haha.

I hope you have/had fun! Your hair will be fine--sometimes fun is more important than hair (gasp! it's true!).
3a/b, F, normal porosity

Wash with either Suave Tropical Coconut, As I Am, or CJ Daily Fix
Condition with STC or Yes to Blueberries and detangle with Denman, rinse very lightly (baptismal rinse)
Add LAL gel, either Sport or Wet Look, scrunch with flour sack towel, and plop
Diffuse 5 minutes, then air dry