Dig a huge pit and build a bonfire in it. Stoke that bonfire with logs all day. Pretty soon you'll have a nice bed of coals. Stuff your hog with potatoes, and carrots, and everything tastey. Then toss him in the pit, and cover him with as many coals as possible, and burry him. Then stay up all night drinking beer with your buddies, and have a big BBQ/picnic the next day
When I was really little my unle did this with a pig. I don't remember how it tasted, but I remember the party, cuz all the men had stayed up all night to "watch the pig" (even though it was burried) and we all drunk as skunks
At the very least I would salvage the backstrap and the ribs.