Except the away end at the DW is unreserved seating for RL games. Saints fans queue up before the turnstiles open and then do the RL equivalent of sticking towels on sunloungers to try and save the seats for their mates. Similar story in the South Stand for home fans. I should know, I spent 10 years printing the tickets.
(It was reserved seating for the World Club Challenge, but that was a whole other set up)
Also I should add that the North Stand has 5,400 seats yet only a maximum of 4,800 are allowed in with reserved seating and even fewer for unreserved so that makes things easier (might only be 4,600 now based on Bolton’s allocation a few weeks ago)