I already posted the solution to this whole thing... don't do it as an announced show.
Just have elecTRONica start as normal and then a bit in, pull out Daft Punk and have them spin for an hour or two and done. Since no one will know and since it isn't announced, people won't come in huge droves. No need for additional security.
Also, how did DLRP handle the crowds when they reopened SM:M2 and had Tiesto spinning all night? They literally had a whole rave going in Tomorrowland with lasers, lights and fireworks. Did they have a huge drug problem?