I usually cook mine at about 250-260, and it takes roughly only about 1 hr / lb, give or take. 240, perhaps an hour and 10 minutes, so you're looking at about 9 to 9.5 hours, IF that long.
Yes, you're on the right path.
Hance - Lake Dogs Cooking Team - MiM/MBN/GBA CBJ and comp cook
Lake Sinclair, GA (strategically about an hour from everywhere)