Well, I tell you what. Up to only my last two chicken smokes, it was HH and hope for the best. Although the skin wouldn't end up rubbery, it never got crisp or anywhere near "bite through" tender, either...and if I got done too early, then the skin's texture went downhill quick.
Well, take this for what it's worth since I'm new to this low-n-slow chicken thing, but this is what I'll be doing for my two racks of leg quarters that will cook under two or three slabs of spares on Memorial Day. The only thing different than from my last chicken cook, which turned out to be my best ever is I'll let the chicken dry overnight in the fridge.
Sunday evening,I'm gonna do the "pre-seasoning prep" for my leg quarters (smaller the better) : After twisting the leg out of joint, I'll pull back the skin and remove all the globs of fat that come off easy and quickly. Next, I'll dry brine in the fridge with a "light snow blanket" of kosher on all sides (1.5-2hr), next rinse thoroughly, and then air dry on cookie cooling racks in the fridge overnight.
Monday, after I get my spares smoking, I'll season my leg quarters with a bbq rub, missing the salt. First, I like to sprinkle some under the skin since some in my family won't eat the skin, no matter how tender it is.
Next, I'll put a couple pads of butter underneath the skin on each thigh. I understand that you can use Parkay for this step as well, but whichever you chooses, I think this is likely a critical step in getting the skin to saute' until tender...whether as important as air drying, I don't know. I suspect maybe not quite as important as removing the big globs of fat, though. (Like I said, I'm still new to this.
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After pulling the skin tight around each leg quarter, I'll sprinkle with the rub and then lastly, hit both sides with Canola cooking spray and they'll be ready for smoking. Cooking around 235* I'd give myself 3.5 hrs, but I try to cook at about 250* measured with a probe in the vent and unless the leg quarters are large, 3 hrs should be about right to get 170* in the thigh, which is fine, at least if you disjoint.
Hope this helps. Go easy on the smoke, and I think this method is kind of hard to mess up. No glazing or saucing is required or suggested at all, but some Alabama white sauce available on the table is kind of nice.