On the topic of misting. It's not a *terrible* solution, but it's far from the best. Can be useful during the actual shed process. But I must advise, if you are going to do it, make sure you mist the sides of the enclosure, preferably midway up or higher. The evaporation will increase the humidity a little bit while it's drying and can be held in with plastic wrap, plexiglass, aluminium foil, or even a damp towel. Just try as hard as you can to not heavily mist the whole enclosure as damp wood will mold quicker.
There are other solutions if humidity is an overall problem, like getting a humidifier for the room or even a small humidifier to run occasionally piped straight in to the enclosure (there's a really cheap DIY method involving an air pump, some aquarium hose, a plastic bottle and some water and ice).
There's also the option of a moist hide. Even if it's not actually used by the snake, the damp moss will help keep humidity up in the enclosure as it releases moisture over time.