Jonas Brothers GMA Performance?!!

I want to go see the Jonas Brothers perform at Bryant Park on the 8th. I realized that if I want to get a decent spot, I'll have to camp out. I'm only 14 and I don't have anyone to go with yet. I've lived in NYC but I've never camped out for concerts and stuff. I'm really responsible and smart and I have a cell phone. What should I do to convinve my parents to let me go?!! I REALLY want to see the Jonas Brothers <3. Help please!!