Make an incision down the belly of the snake. Make sure it is in the middle. Since you are going to make a hatband, you can make the incision all the way down. Skinning the head can be tricky if you have never skinned an animal for taxidermy purposes. You don't need to use a scalpel after that, just pull the skin off. It comes off rather easy. Once skinned you need to scrape ALL the fat and membranes off the skin. You need to scrape (with a dull serrated edge, if not comfortable with that, use a spoon) from the head towards the tail; and from the inside towards the outside (belly scales).
You do not need to use salt. Once the skin is completely fleshed, wash slightly with dishwashing liquid (small amount) and then rinse well. Tack it on a piece of plywood, scale-side down, flesh-side up. Place the board at an angle. If rattles are still attached make sure that they are leaning up.
Mix rubbing alcohol and glycerine (1:1) and shake well. Then brush on with a toothbrush or small paintbrush. The first coat will disappear quickly (overnight). Add another coat, it will take longer to disappear. After a few coats, the skin won't be able to take anymore. Then lightly wipe off.
That's it. Good luck.
BTW, I've done taxidermy since 1974 and have been Nationally Certified (through State & Regional Competitions) on Reptiles since 1997.
Kerby...