If you are going to be in dtd and try to see the fireworks, I would wander over to the paradise pier hotel. If you go to the pool area you'll be able to see the fireworks and they pipe the music in. You wont get the full show that you would see from the hub, (and I recomend you do watch them in the park at least once during your visit) but it will still be pretty good for a "free" show.