I have a 40gal glass tank for my bp. I place moss in the hides and it gives me great sheds. I keep the moss moist during a shed but let it dry out before making it damp again when not in shed. It works great even with the humidity in the tank being in the 30s.

It really does not require much effort and is much easier than humidifiers. I will add that I have a mister bit it is actually for my live plants. It only goes off twice a day and that only because once is not an option.

So moss with a daily mist should work for you and your snake.