That barrel Cooker looks awesome, looks like thou could do a lot of food at one cook.
Like SC said, I would be worried if somehow the cook got away from you, you could lose some ribs from the bottom?
Yes you can, the grill comes with 8 hooks so you could hang 8 racks of ribs or 8 chicken halfs at the same time. Larger meats like brisket takes 2 hooks but you could only fit 1 big packer on the rack after foiling and that took up the whole rack, least mine did. I have done 2 pork butts at one time using 2 hooks each and was able to fit the both side by side on the rack after wrapping for another 90 minutes and they were done, and fit 2 flats side by side as well. Total time for a 14# packer was just over 3 hours and about the same for 2 7# flats and also 2 8# pork butts seperate cooks though.
The grill holds the heat so well that you could cook 1 packer thru the initial cook hanging then wrap for another 90 minutes and still have plenty of coal and heat left to run yet another 3 hour cycle for another packer no problem.