Is it too dangerous to smoke a stuffed turkey?
I've had delicious hot smoked/grilled turkey, which was brined first (not stuffed).  However, stuffing always becomes a problem with turkey.  Whether you smoke, or cook in the oven, you are going to over cook the white meat by the time the center of your stuffing is at a safe temperature.  You can certainly make it safe by using the appropriate temperature, time, and measuring with a thermometer. ...and, brining can help retain moisture.  Having to wait for the center of the stuffing to reach a safe temperature means that the question will be, how overcooked can you stand your turkey meat?