You absolutely can, I've observed many weddings with DJs and emcees present just make sure you bring your own power source as they do not have available power.
Bring a generator
I think, they do have power, because last time I was there, I was listening to the hostess by the speakers and also there was a DJ
I was there 2 days ago and there was a music video shoot. I am guessing there is no power due to the fact that they brought a generator and ran it out of the back of a truck. Go and check it out but my guess is you'll have to provide your own power.
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