To properly band your trees, you're going to need 4 items:
It's been difficult to get these items in Charlotte, over the last couple of years. Amazon is the best way to get them, so I've provided the links, above.
You might need to use tape or staples to attach this to the tree before you proceed to the next step. Trust me. It's hard to keep this on the tree while applying the paper. You'll need enough insulation so it fills up spaces (cracks, bark, etc) and prevents insects from crawling under your wrap.
You'll only need one layer of paper, perhaps with a couple inches of overlap, at the end.
This is sticky stuff. Don't wear your best shirt. You might need latex or vinyl gloves. Remember, this is poison. You don't want this on you, your kids, or your pets.