I am an advocate for calling back and confirming all PS according to the PS Number. If anybody has ever seen the CRO PS software, it is very easy to book on the wrong night, or even the wrong restaurant, that is because after a PS is made, all of the details are defaulted when the next PS is made.
For example, if you walk up to a Guest Service counter and they open their PS, all of the details would be for the previous PS that they made. If perchance they just made a PS for December 6th, and they are not extra careful, your booking will also be for December 6th even if they change the restaurant selection.
So, if you are booking all different nights it's very easy for one of the settings to go unchecked.
My suggestion, after each booking ask the operator to repeat read the entire confirmation that is popped up on the screen when the PS # is issued. Write it down.
Then, call back at a later date and confirm each PS by giving the PS#. It's very easy to verify all of the info, including any special comments or requests.
It is well worth the extra effort, rather to be told that your PS was made for another night, when you arrive for your meal.