Show is 9:15 pm.
If they are lucky they will sit about 6:45 pm, likely take an hour to eat and pay, unless they hit bus perfectly would be hour to travel, walk/security/ticket into park add 30 minutes then walk to back of park to ROL ......... extremely tight.
Do they have FP+ for the show? I mean if they made it by 9:15 they would be let in, not great seats but .... and I guess I would ask which is more important to do.