I never have an issue with temps from 250 -290 it will rise up on its own at 300+.
I am not a big fan of perfect temp = good que though. I cook on all types of cookers, some with good controls and some without.
Usually the results are close to the same.
You do what you have to do, so you can do what you want to do!
Ole Hickory Ultra Que 2
18" Weber OTS
Primo Oval XL
NB American Gourmet offset smoker
Big Chief Smoker