I have been to many AES shows, both in NYC and SF as well as almost two dozen NAB conventions in Vegas. I highly recommend that anyone pursuing audio, even as a hobby, go and attend the AES sessions and "do the floor." They'll be a real ear opener.
The AES show is a lot smaller than the NAB show. You can do the floor at AES in a day and a half if you spend enough time really looking at everything, but the sessions take more time and are worth it. Even so, you just can't see everything. Great Fun.
Here's a link to this year's show in NYC. They alternate coasts each year. This year it's October 18-21.
The NYC hotel prices are pretty steep, so maybe try AirB&B.
Regards,
Ty Ford