B, I recently switched from water to clay saucer after doing alot of research on here. I must say, it is a world of difference. I was nervous at first and had to get used to another technique i.e. quick and higher temps etc. But other than that, it is something you should try. I too, have a 18.5 WSM, newer model and have done several cooks and have good build-up. The control of temps are realitvely the same for me, just quicker to reach higher temps but once I get it dialed in, it's just like using water! So far, I have done turkeys, brisket, ribs and butts both ways with water/no water. All have been successful in my family's opinion. Cleanup is a breeze as I also had the same concerns like you IRT my dogs and the aftermath of the smoke!
I bought a 12in clay saucer at HD (I may get a 14in as the 12in seems a wee bit small) and place it in the water pan. Then, tinfoil over the top. The 12in saucer sits down in the water pan pretty far, so I make a "cup-like" indentation in the tinfoil, to catch the drippings. It has worked flawlessly and when done, just remove the tinfoil and ball it up, throw it away!