Last year was the first time I went. The one thing I would say is go to the upper floors of the tower side early in the day. I found that you end up wasting too much time waiting on the elevator later in the day as they are busy going back and forth on the upper floors. By the time an elevator shows up at ground level, you can't get nearly enough people on to them. I also agree with prioritizing rooms you want to hear as there is just too much to listen to everything. Have fun out there, it is a blast.
