Layer one is either baggies or plastic wrap, whichever I have and then a layer of waxed butcher paper real tight and secured with heavy masking tape and then into the deep freeze. I too have done this now for 25+ years and I routinely eat 2 year old meat and sometimes older. Never had a freezer burn problem. I too leave the meat in as big of chunks as possible, removing as much fat and all the bones. I also leave the silver skin on the loins as I believe it adds an extra layer of protection. Besides, it delays work that way too if you're doing multiple animals. I also only grind and mix small bunches of burger and sausage from the bigger chunks throughout the year as I need it.