Yes, I am sure he knew the police were there. That was the whole point of the way he was yelling and her etc. You could see it in her eyes that she knew it too. Great writing. Also, was it perfect that Walt was waiting on the curb for the van with his bags and the barrel!
I did like that. And when he shuts the van side door and the barrel is in there.
I guess he's headed for New Hampshire.