My suggestion would be to speak with different travel agencies regarding their policies. I chose Liberty Travel (they have offices everywhere but I did everything over the phone) because they honor ANY rate you find on the internet up until the day of your trip (for all of your guests of course) and all you need to do is print the details you found online that show your dates and the rates!
We are getting married in January and when we chose the Paradisus Palma Real last year, we were worried about rates which is why we chose a travel agent that honors any rate you find. I was checking rates all night and day, every day! I did find that on Saturdays at around 9am / 10am, the rates dropped a bit.
Long story short, the rates are still posted online for PPR at around $550/nt but as of now, my guests are booked at $369/nt!!!
Hope this helps!