I've been four wheeling through many areas of the Pine Barrens for 25 years. You have to stick to the trails, and can't worry about getting your paint scratched. But if you walked 50 feet off of some of those trails, you wouldn't even have to bury a body. It would never be found.
Some areas of the Pines contain Peat Bogs, and we all know what happens to bodies that get tossed in those. Jimmy Hoffa may yet rise again, 10,000 years from now.
His kidnappers were neighbors and their kids or one son (can't remember) attended the local high school.