Hi:
IMHO, there are no such things as stupid questions. There are, however, stupid answers. Hopefully, this isn't one of them.
I've been told time and again...it's done when it's done. I've been learning that for pork, for example, it's done when it reaches an internal temp of ____. Ditto for beef, poultry, and whatever else you're cooking or smoking.
So, depending on what's on the cooking grate, as someone else in this forum alluded to, it'll take as long as it takes.