Top areas to watch fireworks not named Main Street.
Fantasmic viewing area - you also see the water projections, not easy to see Tinker Bell
Exit to Big Thunder - Great view of all fireworks, can see a bit of Tinker Bell
Near Dumbo - hard to hear music, no projections, can see Tinkerbell if you turn around
Near Storybookland - Can hear music, no projections, can see Tinkerbell if you turn around
Small World facade - Really close to launch of main fireworks, see projections, hard to see tinkerbell and castle fireworks.
Note have not tested Tomorrowland area