Hey lake dogs how long does it take you to smoke a 9 lb butt and 15lb brisket? What temps are you running at?
My smoker likes to settle in at 260, give or take 10 degrees. I cook everything there, butts, briskets, ribs, etc. Not chicken, because that'll get you rubbery skin every time, but that's another story...
Cooked fat cap down, I foil both right at the 4.5 hour mark. Still; fat cap down. Both cook for 9 to 9.5 hours. If we're fast on the foil and the smoker isn't open long; its usually more like 9 hours. If open longer, more like 9.5 hours. Rarely does it dither much more than 15 minutes...
I then relocate them to a cooler (used as a warmer). They'll continue to cook. Oh, I pull briskets first. The reason is that everything will continue to cook in the warmer; the brisket can get over-cooked in a big way...
If I'm playing the Money Muscle game with butts I remove them on temperature, not time, and they still cook wrapped up. I remove them at 180, because they continue to cook... In this case, I cook 4 butts; 2 for MM's, 2 for pulled pork. Sliced (or cubed) pork doesn't play well here in the deep south. I'm not sure how it does it other areas, but not here..