A fas­ci­nat­ing 3700-word piece by Kirk Tuck on shoot­ing high-tech events for high-profiled clients.:

…you need to be able to move fast, not draw atten­tion to your­self and get the shots you need with­out dis­turb­ing the sub­jects. They are engaged in high stakes busi­ness. Your job is infi­nitely sec­ondary, in the grand scheme of things, to what they are try­ing to accom­plish. And they are sched­uled tighter than a space launch. When we shoot cor­po­rate shows it’s cus­tom­ary to wear black when you will be mov­ing around the “main tent”. That way, if you need to walk thru the audi­ence or near the stage to get an impor­tant angle you blend in with the dark­ened house. If you wear bright col­ors you stick out like sore thumb and hun­dreds of eyes will fol­low you as you move. […]

Another sound advice:

The real secret to good cov­er­age is to blend in with every­one else. […] Here are two very impor­tant photo tips: 1. I never car­ried a cam­era bag around with me. In most instances (out­side the main tent) I walked around with one cam­era in my hands and an extra lens in one pocket. I tried as much as pos­si­ble to look like just another attendee who hap­pened to bring along his cam­era. Not like “The Camera Guy!”…

Read and learn.