I have used a Brinkman propane water cooker/smoker for nearly 20 years. I use green white poplar (a local name for what I suppose most people call aspen) sticks on the stones for flavor, two as thick as your thumb, about 4-5 inches long. I keep some in a baggie in the freezer - always nice and green!!
For the brine, well.... you would have to come each time for a "unique" mixture. Water, orange peels (again, I keep some in the freezer), whatever old BBQ sauce I might have in the fridge, maybe some seasoning like Mrs. Dash, or whatever. Oh yes, and onions - cut up a whole onion and dump it in. Part way through cooking, we brush some kind of BBQ sauce on to the meat.
Try to keep the water just rolling nicely, don't let the bowl get low on water. For baby ribs, the poplar smoke flavour is out of this world. Apple or crab apple wood is good too. I bought one of the el cheapo Princess Auto charcoal cooker/smokers, but haven't cracked it out of the box yet. The propane one works like a charm.
Don't expect the food to be cooked quickly. They aren't exactly the "get home after work and cook supper" kind of deal. I've cooked ribs, steaks, roasts, pork chops, sausage, chicken, turkey, corn on the cob, ham steaks, and maybe other things. The propane one works good in the winter if you can get it out of the breeze, i.e. in the garage or garden shed.
Have fun. You will get a lot of good meals out of that thing!!
