there are many conventions that weekend, edc is not as big a deal as the International Esthetics Cosmetic and Spa Conference (IECS) - 2013 which is set to bring in 32,000 people and Licensing International Expo 2013 which is set to bring 20,000 people. You can check list here.

http://www.vegasmeansbusiness.com/planning-tools/convention-calendar/?formid=2&e_sdate=06%2F17%2F2013&e_edate=06%2F23%2F2014