you can always just add a humid hide and your snake will use it as they see fit. I just use a ice cream tub with a hole in the side and i filled it with moist but not soaking spahgnum moss.

I use the Forest Floor cypress mulch; similar to the repti-bark and it works fine for me and i dont have to mist it...about once every 2 weeks I pour water on it and mix it up then replace it after 1-2 months.