Whoa... this is crazy talk to me. IF you're wanting a prime viewing spot for PTN, I understand. But if your main concern is the fireworks, don't do this!
Hang out in the shops on Main St during PTN. When you see Mickey & Friends start to go by, get ready. As soon as the last float goes by, step out onto Main Street.
If you're only going to watch Fireworks once, Main St is the place to be. We watched it three times during our stay, once on Main Street, once by IASW, and once from our Blue Bayou F! viewing location at the Rivers of America. Main Street is by FAR the best.