Can someone explain to me what this new room type "5th sleeper" is at POR?

We've had 5 in my family every time we've stayed at POR but this time (for next year trip) we have to stay in a room type with this 5th sleeper label.

Is it just a way for them to charge more? Or have the rooms been refurbished in the last year to make them different in some way for a 5th sleeper?



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