Personally, I would never under any circumstances even consider not providing water to any animal, no matter what kind it is. Water is a basic requirement for life. And while misting may provide moisture, unless your snakes talk, how do you know it's enough? To me, it borders on cruelty to not provide water. And speaking of cruelty, you better hope you don't get reported by someone near you, because BY LAW any animal kept as a pet must have access to fresh water at all times, or you could loose your pet. Just saying.
Gale