Thank you for the replies everyone, I appreciate it. Donn, I will look into Oxbow as well, thank you.
Unfortunately I have tried everything to drown out the noise, I have a pretty powerful home theater system that I have tried playing classical music to calm her, but that didn't work. We spent our new years eve this past Jan driving the dogs down South on I5 until about 2:30 in the morning because she was absolutely terrified in the house.
She is a 170 lb Mastiff, and when she's terrified, she tries to go behind the TV, furniture, under tables, etc.
I thought one of the campgrounds out in the woods might work as long as it's far enough away from the city displays. I was thinking Barton Park or McIver park, but then I read that Estacada has a fireworks display on the 4th. She would most likely be able to hear that from either of those 2 parks.
Thank you all for the suggestions, if anyone thinks of anything else, please post.