Welcome to Cheftalk - what kind of turtle are we talking about here? You can place the turtle(s) in a tub with water and corn meal and change it out over a couple of days to clean it out, or dispatch it and go right to work. Here is a good article on the second method that also work after the first. Turtle meat is absolutely delicious and I've caught and cooked turtle with I was younger. I might give it a whirl again sometime. Hey it's work, but anything you harvest for food is worth the effort.