First of all, what sort of look are you trying to create?
Does it hold a curl well or will it need a lot of product applying? Not much point spending time making it look pretty if it's going to drop out within 30 minutes.
Definitely watch some YouTube videos for perfecting your technique and practise a few times beforehand.
With a wand, I'd start with small neat sections and wind down from the root. A large wand will create very loose waves compared to a thinner wand. However, it might be best to use a thinner wand and then loosely tease your hair with your fingers when you arrive at the venue.
Also, protect your hair from getting damp on your way there, otherwise any style will just drop straight out if it gets a whiff of moisture.