We found the fireworks to be one of those moments that was not all it's cracked up to be with our kids. They were really loud and both our daughters freaked out. After we survived that, it was like being part of a herd of cattle to get out - not good, they then moved to crying from being stepped on.
They are older and I hope will do better this time - because, selfishly, I love fireworks - but we decided to make a dinner reservation at Kona our first night and watch the fireworks from the beach after. I'm hoping it will be both less loud for them and also easier to get to the TTC after.
Maybe an option to consider?