If kept indoors, no hibernation needed. In colder areas water must be deep enough that turtle can remain under frozen upper layers of water. Be sure area will not be flooded by rain. Box will mulch can be placed in garage.
Some moisture is required in any setup.
Can also place in dry box with dry grass clippings and keep in cool closet or under a bed. Provide adequate heat and dry enclosure. Can use small doghouse elevated off of damp ground.