I believe the rooms are upstairs in the main pub building (the one to the west), and the building to the east is the bunkhouse (see bottom half of https://www.thestationinnribblehead.com/accommodation/). There’s a big sign for the bunkhouse on the south-east-facing wall of that building.

As far as I know, the camping is no more, but they do seem to allow caravans in the car park (there were 8-10 of them there when I was last there a week ago).