Okay since, i am under 18, can i go to the concert to watch RATM with a person above 18?

Also, if me and my friend only want to see Rage, can we just buy two 1 day passes for 85 dollars each, for just the 29th?

Also, since i am under 18, and cannot camp, how do i see RATM?

What is camping basically?

Lastly, I heard that other bands will be playing on the 29th besides rage, can i watch them too if i bought a day pass?