Lampe, you kill me...
There's two ways that I know of to get a thick smoke ring (other than Ray's way).
First way is to go directly from the fridge to the cooker. Have the cooker at a low (200-225) temperature to start off with. You can run the cooker temperature up later. There's no rule that says that you can't change temperatures in the middle of a cook. Also, be sure not to cake on any rub or slather. The meat exterior needs to see the heat.
The second way is artificial and in my opinion just looks fake. It involves TQ and when I judge I can spot it a mile away. So don't bother even trying it.
Russ