For my tubs not in a rack, I use a 41 quart Sterilite locking lid tub from Walmart, one small kitty litter pan as a hide, large crock water dish, Accurite digital thermometer/hygrometer, flexwatt and a thermostat.
The hide is large enough for the adult females to choose the cool end or warm end of the hide. When done, it looks like this:
The snake was in the cool side of the hide:
And this is her outside of her hide:
I have nine tubs set up like this.