We stayed on the 2nd floor above Big River too, and I didn't find the restaurant noise too bad, but what I *didn't* like was the boardwalk games (basketball/ring toss) noises so far into the night. I was surprised they were operating so late, particularly since we were there in January. The bells and buzzers got a bit irritating towards the end of the stay. But, then again, it wasn't like it was a surprise, so I'm not complaining.
The walk to the room was relatively short, and we found a "secret" exit

that cut down on some time on our way to breakfast at the bakery.