How to sign up for a tourney in Vegas

[housechop]

I posted this in the Beginner's section, but maybe this is a better place for it...

Long time reader, first time poster... I did a search and did not find this.

I am going to Vegas in a few weeks - I have been to Vegas before, but only for table games; this is my first time playing poker there.

My question is how do I go about signing up for some of the regular tourneys - I'm talking about the Caesar's $330, the 8pm game at Binions, the Venetian $540, etc... I have only played a few small local tournaments and I actually sign up by going to the cashier, paying for the tourney, then I get an entry slip I take to the poker room.

Is it the same in Vegas - do you go to cashier cages first? Or do I go to a poker tournament area to sign up for a tourney?

Also, I believe you can only sign up 2 hours ahead of time, correct? (10am for a Noon tourney).

Thanks in advance!