We just got back a week ago from staying 11 days at the Poly. We were able to watch the fireworks many times from the beach. It was pretty easy to find a spot on the beach to watch. You can see both Wishes and the Light Pagent quite clearly from anywhere on the beach. When we were there, there was a bar opened by the pool and serving drinkks. Our experience was that the music from the pagent was easy to hear, but the music from Wishes was hard to hear and sometimes in autiable from the beach especially on a busy night with people talking and making noise around. We found it very frustrating because the music helps create the magic. There is a lounge area inside the hotel where you can see Wishes thru the trees and the music is a little louder.
If you can time your ADR right I've heard that you can see Wishes from the Ohana. I think they pipe the music into the Ohana also.
Never Land club is in a building very close to the bus stop.