Well, I don't know what prompted me to do it, but I just checked out Chris A.'s smoking logs for his long cooks as journaled in his cooking section here on his site.
In the first two long pork butt cooks he journals, "the Renowned Mr. Brown" and "Mustard Slathered.." as well as the "Midnight Brisket", Chris notes STIRRING THE COALS, TWICE, each of the cooks. He has temp dips, and his temps even fell to 180 on the "Mustard Slathered" cook, 12 hours into it.
So.....going by his rather meticulous record keeping, my own experiences, and as well as at least one or two posters here
.....when using Kingsford, I guess ash is something you might just have to deal with, at least on long "low and slow" cooks.
My theory is that some of you folks that don't seem to have any problems with Kingsford ash are cooking a little hotter than 225-250, and the fire gets a better supply of air flow. For instance, if you are measuring 250 at the lid opposite of the vent, you're probably cooking at least 25 degrees hotter than Chris did on the average, as he tryed to keep it in the 225-250 zone, measured at the vent.
Thanks for all the input!
Dave