Love a good smoked chicken leg quarter. I did some legs just the other day on the Weber kettle. Hit them with a simple rub, ran them around 275-300, used a small amount of pecan chunks. Chicken is done at 165 but to me you want to get it up to 175-180, especially dark meat. Once they got up to 165, I put a little bbq sauce on them and let them go for 20 mins more or so on the indirect heat side.
Some folks like to move them over to the hot side to let the skin sear. I don't think this does any harm as long as you don't scorch your sauce (which is easy to do), but to me smoked chicken skin is always gonna be kinda weird no matter what you do so I never bother.
The temperature probe is about the most useful bbq tool I have, really can't recommend enough getting one. Something like this is all you need: