Awesome, I planned my trip in July just so we could see the fireworks.
Yes, you can see them from the RPR. There is a thread in the hotel forum talking about. The first digit of the room number is the tower. The 2nd is the floor. The room you want is 1731 or 1733. That room is at the end of the hall and it faces the parks. I think the room numbers of that hall go up to 1755, I have it written down at home. That's tower 1, floor 7, and the room numbers are odd.