I preheated my first turkey, what a waste, but I know better now. That reminds me I have another in the freezer to practice on, you know, it is almost that time of year.
That funny Texas wood,mesquite,I would preheat if I used it...maybe not for a PB or brisket, now that I think about it.
As far as the probes, ask the comp guys how many they run out of their smokers. I know thats different.Well not to me or my family. Start smoking and one gives out, see if your glad to have an extra in there, don't ask how I know this!
Still makes me mad about them PB fat pockets, how come I'm the one so good at getting a probe in the fat pocket, oh well!