Some of the links on this forum allow SMF, at no cost to you, to earn a small commission when you click through and make a purchase. Let me know if you have any questions about this.
I've used brine for poultry and pork shoulders for a long time. I think its a great technique if you want a juicy smoked end product. Over time I've tried all kinds of ingredients for them but these days I just keep it simple. In my large stock pot I heat up a gallon of water, to this I add one cup of kosher salt, one cup of white sugar, 3 or 4 bay leaves and a small handful of pepper corns.
I get this fairly hot, say just bellow a boil and then turn it off and put the lid on.
Once this has fully cooled to room temperature I add the pork shoulder, turkey, whatever. I add whatever water is necessary to cover the item being brined and put it in the fridge for at least 12 hours.
As I said; I've tried all kinds of different ingredients but this brine seems to do just as good a job and is simpler to prepare.
I'm with Geezer, simple seems to work best. Most times I just use salt water at the same 1 cup:1gallon ratio. For pork I'll add sugar or brown sugar, but for chicken or fish plain salt water seems to work well. If I'm in a hurry, I'll just mix up a quart and inject the brine.