try searching in google 'frilled neck care sheet' you'll get alot..
im interested in them aswell, and did a fair load of research..
basically a 4x3x4 enclosure is suitable for one dragon, i wouldnt house two together, they go for each others fills and the stress of overbreeding and territory that is ever present in their instinct would be overwelling in such a small environment, considering one males territory is HUGE!!!! in the wild.. they like to be high, so make sure the enclosure isnt on the floor.
no sharp edges to get their frills stuck on.
they grow to be 3 foot, so i wouldnt use an enclosure that isnt at least 3 ft wide, longer in length and preferably taller then them, considering alot of frillies kept in short enclosures encounter tail deformities as they cant be entirely straight.
verticle branches as well as a mix of those on a tilt. they bask verticle to aid digestion and laying flat can cause them multiple problems..
i would think warm showers (no too hot or cold) would be good, same as with beardies.. to keep them hydrated.
hatchlings are especially prone to dehydration. and the reasont hey are on class two as they can be a look and not touch animal, and they DO sulk ALOT, to any change.. thus making them at times hard to care for an an inexperienced keeper would find this hard.
hope this helps..