Yes, I think so, frankly with room to spare. Last cook I did was for 42-44 people; I did 6 large butts and 8 racks of babyback ribs. Like always, the ribs were snarfed up fast (I was out in the boat; none there when it came time for me to eat), but even serving EATERS many times (2 people came back for, and I'm not kidding here, 7th helpings), we still had some leftover pulled pork. Your 5 or 6 butts should hold their own without the ribs...
* OFFICIAL NOTE: We serve Coke, REAL Coke, ala. Coca-Cola because I'm from Atlanta (home of Coca-Cola). Not cocaine! However, by the way a few of my dear friends and nephews eat, you couldn't tell that the BBQ wasn't coated in cocaine....
Hance - Lake Dogs Cooking Team - MiM/MBN/GBA CBJ and comp cook
Lake Sinclair, GA (strategically about an hour from everywhere)