Sunderland player arrival

I’m in Sunderland this weekend to watch the game. I’m here to see Brobbey play (and ofcourse Geertruida and Roefs). My question is, how late do the players arrive at the stadium when the kickoff is at 3pm? And I saw that they are not allowed to sign or take a picture? And if that’s the case, is there a way or a moment where you see the players and ask for a picture or signature? Thanks.