For Carpets I keep them in arborial caging with still a good size of terrestrial space available. My temperature on the hottest point in the cage can have a ground temp of up to 95, but averages around 92, the perch bellow and off center is usually around 88 and the other perch stays around 82. Ambient rarely fall bellows 80-81, and I keep my cages at 50% humidity until a shed comes which then gets increased to 100% humidity for a few hours, and then drops to a constant 75% humidity for the duration of the shed.
You can keep carpets in tubs as juvenile / hatchlings and grow them out this way. Just make sure you do offer them space up high, some will seriously go bonkers if you do not give them this option. Also, you may want to get creative and mount an RBI hide on the side of the tub near the top for it to use as an arboreal hide. I have a Granite IJ that refuses to use any hides on the ground, and was constantly breaking his flourscent light to use it as a hide way up in the cage (we're talking about a granite that is currently 16" long). So I mounted an RBI hide upside down on the top of the tank, and he goes and sits up in it :-) not too hard to do just takes some creativity.
I can't see the image (at work) so I can't attest to the locality (or more properly defined sub-species). Where did you get it from? There are not many people that can guarentee a pedigree. All my snakes have pedigrees with them from the breeders (Nick Mutton is the breeder of the majority of mine, ACR is the breeder of the rest). So I work with very traceable lines of snakes to keep them pure and good looking :-).