X17 XCLUSIVE - WE'VE GOT THE ONLY SHOTS OF BRAD IN VEGAS!

So here's what we know about Brad Pitt's Vegas vacay so far: Brad's pilot checked into the Hard Rock hotel yesterday around 1pm, and Brad, Maddox and Pax checked in around 5:30pm. There are no nannies with the boys, just their 2 bodyguards and the pilot.

Word on the street is that Brad's security team isn't fully cooperating with the Hard Rock security, and it sounds like the actor is trying to be as sneaky as possible. Brad and the boys have been seen hopping in and out of an Escalade, and so far he's done a pretty good job going unnoticed, but last night his lucky streak ended.