For best results I suggest you have your 'man' front row center with a shotgun microphone, held, head high, pointed directly at Bono. This will insure that your tape has nice clear vocals. Use of a pistol grip should help avoid hand cramps, and a zeppelin-style windscreen will help reduce the effect of indoor breezes caused by MSGs state-of-the-art air conditioning system. Something like ths should suffice:
For the second, or 'ambient' mic...well, it's not much of a secret that the upstairs rest room at the rear of the hall is revered by tapers-in-the-know for its sublime echoacoustics. Make sure your other 'man' gets there early so that he can score the handicapped stall near the wall for maximum comfort.
Good night and good luck!
(Flame away, but anyone who comes in here talking that kind of game deserves a proper heckling)