I've also done NYE at Universal, and it was a blast !
It was some time ago, in '94 in fact. As I recall we headed off to the park mid evening, around 7-ish, and though the park was busy of course, it wasn't ridiculously or unpleasantly so. After going on various rides, we set ourselves up somewhere near the lagoon, and watched the boat stunt show (I think it was a special one for that night), then the fireworks.
It was a fresh evening, and there were so many fireworks going up that at one point for a few minutes, the air was so full of both smoke and mist/steam that you really couldn't see the fireworks as mush as hear them !!
We had a great time and wouldn't have missed it !
My lass and I are bringing her kids over this Boxing day, and it's a pretty good bet we'll be going to Universal, or IOA, for NYE.
As I said, I went some 9 years ago, so I cant be sure, but given that there is all the extra capacity of IOA now, I wouldn't have thought it would be much busier now.
Hope this helps !
