I have a standard room at PPH booked, we just added a 5th person to our adventure. Do I need to change my reservation to ensure the extra bed or do all room accommodate 5??
So long as you get a 2 double bed room, then you can theoretically sleep 5 as there is a sofa that turns into a bed in the room. Depending on your group make-up (children vs. adults) it can be tight but doable.
I'd add the 5th person to your reservation. It'll move you up in priority to get the day bed room. Otherwise someone may be sleeping on the floor. But PP is correct all standards that fit 4 also fit 5.