guys, I cook lots of whole pigs. I do it a little different than you...there's lots of ways to skin a cat, as they say.. we split the spine all the way through, and lay the skin side of each half down, ham toward firebox if you don't have coals UNDER the pig - the skin gets real crispy, making "cracklin's". Some people like them chopped up and added to the 'cue in the South.
We make a mixture on the stove of apple cider vinegar, red pepper flakes, and salt..and use a sponge to 'dab' the hog with that while its cooking for around 16 hours at 275 degrees.
The meat pulls off the pig easily..hence the term "pig pickin' in the South...and boy is it great. We serve it with potato salad, cole slaw, brunswick stew (a real thick chicken pork stew made with potatoes, corn, and other tasty vittles to be like a thick chowder) and hush puppies. Make sure you got soda pop with foam on top, or iced tea to wash it down.