I have a farm buddy that has a smoke house 10' X 10', fricken huge that has been smoking meats for close to a century. He has a family recipe that is equally as old, and the best I have tasted. His ingredients are a guarded secret, but I know he uses tender quick in it.
I have helped him make it the last several years, however never think to take note as to what the amounts are that we are using, or even exactly what we put in.
We smoke it for about 1.5 hours, after the smoke house has warmed up. We hang the sausage on long iron rods right over a cedar fence post fire pit that is covered with a huge iron plate causing the smoke to roll out the sides and out the little chimney hole in the center of the smoke house.
Our ancestors made things much better than anything we have now, and sadly this beautiful smoke house will likely not carry on, as his kids are not in the area anymore, and the farm will be swallowed up by neighbors when that time comes.