If you want a park view I believe at RPR you have to book a Pool View Room, but I could be mistaken on that one. If your son has allergies call the hotel directly and tell them that your son has allergies and see if they can make sure you aren't near a room that allows pets. Have a great trip!!
I think Tower 2 lower floor is for pets, not sure about others.
For a park view Bubbas Mum, posted some pics of her stays of Park View rooms in Tower 1 , if you search you will find pics and tower and room numbers.