I too had a dog that had problems with fireworks. I most certainly would not take a dog camping on that weekend. It's too hard on the dog not to mention if they bolt and run off in a strange area and maybe never found.
Fireworks may be illegal in most states but I have yet to experience a Fourth of July where they were not going off no matter what state I was in.
BTW: Stayed at a CG outside Atlanta on the 4th, heard gun shots and asked the host if I should be concerned. They said no. Apparently in Georgia they shoot off guns on the 4th.
"We must be willing to get rid of the life we've planned,
so as to have the life that is waiting for us".