I was thinking of a counterpart of the spit. One that could cook larger animals, a structure in the ground made out of bricks and possibly dirt. You would fill it full of wood then place a carcass into it then light it. I was thinking this would take a long amount of time like 16 irl hours or something like that. It could then give double the meat or some other noticeable bonus.
http://bbq.about.com/od/barbecuehelp/a/aa061006a.htm <----- a how-to on pit cooking irl.