Snake Display Cases fro Expos

i always wondered but never asked as i was too busy.

The cases as expos for displaying the snakes. since expos are usually for the weekend, how are they properly heated in the cases. ive yet to see them setup or take down so idk where to look but here.

im guessing as the end of the show they come out of the cases and into a tub for water and what not.

im thinking or ordering this for my display and needed oto know best way to keep them warm. and whats the ideal temperature to keep them at in the cases.

http://www.boamaster.com/EnlargedCage.asp?itemid=3