People get crazy with humidity, to the point of messing with humidity before getting constant heating ( there is another thread where a poster removed the heat lamp to fix humidity before providing a new heat source because so many said the lamp was bad.)
A humid hide is easy and simple. The only word of caution with all hides is avoid holes cut arches from an edge there is no way a snake can get stuck but with a circle hole (like in the center of a plastic container) a snake that fits after a big meal my not and although it isn't a good chance, there is a remote chance and a stuck snake can hurt itself.