Chandra,
Well I am super excited to
get your question! Thanks!
My girls are also very skittish about fireworks noise. It is a concern we share.
As it happens,
La Hacienda de San Angel is a good place to watch the
IllumiNations fireworks if noise is a consideration. Because it is an enclosed restaurant, they actually dim the lighting during performances and pipe in the soundtrack. So from that perspective you should be fine.
One word of warning. As I am sure you have read, getting a table with a view of the fireworks show is
not guaranteed. As long as you go knowing that you may not get a table with a fireworks view, if you do it will make an otherwise nice meal great.
I am sure you have more questions, so keep them coming!
Have a magical (and delicious) vacation!