From someone who has been there:
It's a blast. Seriously. Ron is fun to hang out with. The parties can be awesome if you let it. E3 is insane (or was the last time I went in 2006).
Truth, though: It's a lot of work. Especially with the limited number of people we have. You don't get to walk around and just look at stuff very much, because you're going to be running to and from location to location.
It's still very cool to go, and if you're passionate about gaming and can write, I highly recommend you taking the opportunity. I'm making my first trip back in five years, and I'm excited to be honest.
And hey, new Nintendo console playable on the floor. Think about /that/.