I went to DQ1, had a great time. The sheer amount of people was pretty chaotic, but I went to Tomorrowland in 2015 so I've seen and experienced worse.
The dumb thing I found at the gig was that there was drug testing INSIDE the venue (next to the first aid tent that was closer to the entrance, just over the bridge).
...which meant you had to smuggle your gear into the festival before you can utilize it.
To top this all off, there were reports that police were hanging around and/or watching people enter/leave the testing tent, which would deter people from using their facilities in the first place.