Is there a vet nearby you could take her to?
Even non-avian vets will sometimes treat bird wounds, as wound care is usually similar across species. I would call and explain the situation to the clerk, and request that they ask the vet in regards to this particular case. Even if they won't treat, they may give you advice or direct you to someone who can.
In the meantime, i would suggest using a syringe (no needle!) to flush the wound. If those aren't available, ive seen my mother (she was a veterinary tech) use a small turkey Baster to clean wounds.
You want to flush the wound thoroughly, and be sure that the salt water is penetrating the wound and flushing out pockets of infection. This might take a good amount of forceful squirting, and your turkey may fight you on it, so it would be helpful to have someone else hold and soothe her.
Hopefully if you get the wound clean and speak with a vet, she will be just fine! She may need antibiotics, to prevent the infection from spreading through the bloodstream and making her septic. That's usually the reason animals die from older wounds. High temperatures, panting, befuddlement, and going off food are signs of septicemia, so watch for those. If you see those symptoms, she needs medication immediately, as they can die pretty quickly from this.
I hope you can get it clean and keep her healthy and free of pain! Sounds like she's active, so that's a great sign.
Also, make sure that the others don't attack her or abandon her for the injury - I'm not sure if turkeys do this, but I know chickens will. She's likely in more pain than she lets on, as most animals will hide weaknesses with amazing skill!