You can always go reverse sear. Smoke the chicken to just under done, say about 5 degrees then put them on direct heat to finish off and crisp up the skin. This has worked well for me.
What Rick said. 5 hours is what I do for ribs as well usually closer to 250-275. I usually char them under the broiler once sauced sounds like just fatty ribs.
I tell him no when he gets close, 75 lb lab-Shepard mix. He gets the idea and watches it but doesn't mess with it. If not the charcoal bowl is usually sitting at a high temperature a singed nose will also do the trick.