The results of my "ceramic dish in the water pan" cook are in, and it was a rousing success. I have both a 12-inch dish that fits in the Brinkman pan, and a 14-inch dish that fits into the stock pan. This attempt was with the stock pan and the 14-inch pan. It was amazing. I finally got everything off at 20 hours, and I still have ~1/3 of a ring of charcoal left. It was an easy, consistent cook. I didn't even peek into the access door until somewhere around the 17-hour mark (sorry - I was curious and peeked). I was using some Floresta lump, locally available and packaged by the folks that bring us Picnic lump. I think I'll keep this using this method. But, I will want to try out the smaller dish next time.
Rick