hay
If you avoid the que and arrive late and I agree leave 20 mins early and avoid the rush of people to get to their cars/buss',trains or what not it will be a different experience. I used to see lots of metal bands and on the occassion of a larger concert i would arrive late/leave early and save myself panic/anxiety in doing so. *Maybe if you do sell your tickets you might consider standing outside the venue for a little while with a trusted friend just to experience your fave group*
take care