5. Should I padlock the tent? Will my stuff get stolen either way?
I know you're 16 and all that, but are you serious with that one? It's a tent. Other than cladding it in reinforced steel you ain't going to stop anyone with a knife from getting inside. The post doesn't half sound like a wind-up of Finchley Ted proportions.
Where to keep wristbands? (On your wrist I'd expect). Are wellies optional?
Anyway, if you are the real deal and they are genuine albeit completely naive questions then fairy nuff. I don't expect many Anorakers bother with T In The Park to be truthful.