This is a three month old post so you've probably already figured stuff out by now, but just in case (wouldn't want anyone missing out):
The first two/three days of EVO (Thursday, Friday, Saturday) will be held at the Mandalay Bay convention center. It's a 1,000,000 square foot building and you can walk to it without having to take a step outside as its connected to the Mandalay Bay hotel. Finals on Sunday will be hosted at the Mandalay Bay events center just like last year. Once again, sorry if you've already figured this out by now. Just wanted to throw this out there in case you still haven't found the info you were looking for is all!