mel,....certainly the show must go on,backup everything is never enough, kbs, wires & cables, and adapters of every kind, extra laptops, usb drives, mics, speakers, stands, mixers,and when all else fails be able to do your show using your smart phone also if needed,...lol...when the pressure is on to perform and you have paying crowds you better be ready to give them 150% every single time and be proud of it. What I am tryiong to get at is that we have two totally different experience factors here on SZ which is something to consider when "discussing music"...

Take care