I have been part of the Judging team for the whole hog competition at BBQ on the River for several years and will again this weekend. When I first started judging, everyone was cooking them cavity side down. Now, nearly all of them cook them cavity side up, never turning them. Some of the teams are coming up with ways to protect the loin from overcooking. They are also doing some rib bone sawing on each side in order to "open up" that part of the hog. Injection and Rub is the norm. After a sufficient amount of smoke the hog is covered in foil and allowed to continue to cook.
I'll pay close attention to detail this weekend and see if I pick up anything noteworthy if you're interested.