Check out the Alpine Inn hotel. In the past years it was never listed on Blizzards booking website, but it's extremely close to the convention center, and reasonable prices/rooms.
I'll be there. First time attending. I'm not even sure why. I'm not even playing any of Blizzard's game currently. Hoping to catch Furor at the Hilton bar. Thinking of cosplaying as Sam Deathwalker.