The idea of freezer or butcher paper is that one side can be ironed onto fabric, lifted and reused with out muss or fuss. So it can be used for many things, pattern paper for applique, stenciling, and many other things. I use it for stenciling patterns on canvas bags with fabric paint. It works a treat. Try this for hand applique, iron design piece cut minus the fabric turn over allowance, cut out piece with the sewing turn over allowance. with a hot iron press turn over allowance to the paper side. remove paper. You will have a sharp crease already folded into the piece ready for stitching down. It makes needle turn so much easier.
If you can't find freezer paper, look for a butcher who still wraps meat by hand and ask him to share his stash.