I just did 2 racks of ribs last weekend with no issues, could have done 2 more. One trick is to either get a rib rack, or roll them and put a skewer to hold them together. Doesn't impact the taste or cooking at all. If you are going to be cooking for bigger crowds, you'll want the 22". But the 18" is more then enough for us, I've cooked 2 10 lb pork butts and a bunch of jalapeno poppers at the same time with no problem for a party. I've also smoked about 20 lbs of kingfish at once too on it.
