If your smoker can run at least 10-12 hours on its own...
Fire it up... and put it on when you have your pit stabilized just before bedtime.
That timing is good enough for competitions during afternoon turn-ins.
Cooking at Mason-Dixon BBQ Services
Lang 84 Deluxe Kitchen known as "The Glamazon" , Custom Klose Backyard Chef... of Snot, and a 22.5 WSM
Lang 60 Mobile - The Damsel II, Lang 48 Patio - The Damsel, Bubba Keg Grill - RIP, Double Barrel Smoker and a BSKD