There are several books and a few You Tubes available. No reason you cant do it in the same manner as a machine made trapunto. You'll just be doing the sewing by hand like every one used to do before we had such great machines easily available.
I did find some techniques for hand trapunto suggested cutting into the backing fabric. It is definitely against my sewing religion to cut something that doesn't need it! I am my own quilt/sew police.