Good advice here. Like others have mentioned, we plastic wrap all butchered meat (steaks, roasts, etc) and wrap with butcher paper with a single layer. I have some venison and elk roasts going on 2+ years (we really need to finish those) that don't have a hint of freezer burn. Grind meat we typically store temporarily in freezer ziplocs, thaw when ready to grind, and extrude the burger into the premade burger bags.