The standing area is vast and at the back you can hardly see the stage, so unless you arrive early or fancy fighting your way up front the seats are probably better.
If you are driving a band vehicle, you can't park at the load in area round the back as it's a red route so nearest place to park up is St Johns Crescent.
If you're in the queue, look out for 3-4 people casually hanging out on the other side of the alley. They couldn't more obviously be undercover police if they tried.