If you don't have a container big enough to hold the entire animal, a bathtub works.

Ring the skin of the hind legs, and then slice down their length, working the skin from the animal by making …
Next, cut through the hide and skin all the way up to the hog’s belly and chest until you reach where the neck starts. The video below, clearly shows you how to skin and quarter a wild boar, a helpful tip if one ever gets in your sights. But either way hold the skin with one hand and with a small knife loosen it by cutting the white fatty tissue between the flesh and hair. Again, take every precaution to not cut deep enough to puncture an organ. To skin a wild pig, insert a gambrel into the hind legs and hoist the pig high enough to work on comfortably. Start by slicing the skin up the inside of each hind leg, then circle around the hock. To skin it, use a gambrel to hang it from a steel frame or sturdy tree branch.

So how to skin a hog?
First, place your knife blade at the start of the hog’s pelvic bone, from the rear. 2. Work the skin down to the head, using a knife to separate the skin from the meat in difficult areas. Hook the pig by its Achilles onto a hook, so that it is hanging head down. You should pay close attention here, because this guy knows just how to skin & quarter a boar hog. This is a very interesting and informative video and if it’s information and instruction you’re looking for…you’ll certainly get your money’s worth here. If you have a partner this will go more easily.

If you plan to roast the hog skin-on, immerse it in 160-degree water for 30 seconds and then scrape the hair off with a dull knife.