Fortunely, there are several elevators so no matter where you are you can take the elevator. If you stay close to midship then you have easy access. They only thing is during fire drill you have to use the stairs but that is all. I have stayed on the Rivera deck on the other ships several times. I always try not to be directly under the showroom or the galley, because of noice and choice midship for less motion and walking from end to end.
Well "hopefully" we won't wind up with a lot of noise over/under us. I have never been on the Rivera deck and that is what my TA picked out, probably because it was ( 4 or 5 doors down)close to the elevator.
As I said earlier, I plan to DO the steps or walk the length of the ship.
If the Rivera deck does not work out, I will KNOW for next time.