Funny thing about the 4th, noises. Have a 12 year old GSP hates 4th and thunder, just looks for an open closet and dark place. Pull out a gun and she is all over it. ready to go, gets wicked excited still when I shoot. Even if it is skeet targets.
But definately, quiet dark place till all is done hopefully with you. But if you are nervous about it she will be. Don't make a big deal of it. Give her some raw meat or something a couple times during the night. Just a taste.