This is a framework, not a recipe. It does not presume what flavorings you want to use. Plug in your own, or use your favorite commercial mix.
It is based on venison. If making sausage from game meats it is usually best to aim for a 70/30 meat to fat ratio.
The additives listed here are all standard, safe products developed specifically to improve the flavor and texture of sausages. Waltons is a convenient source, but similar products are widely available elsewhere. Waltons uses their own custom name for some of them, but if you google for the ingredients all will be revealed.
You should have a smoker setup you are comfortable with because smoking semi-dry cured sausages requires more temperature control than most other smoking jobs.