Hi Glenn,
As for Diplodactylus, it's a wide ranging genus so there will be differences in acge sizes etc but a there is a good article on their care written by Andreas Laube for Diplo's. The article can be found in volume 2 issue 2 of the Global Gecko Asociation's magazine 'Gekko', the article is called "Captive maintenance and breeding of some ground dwelling Australian geckos. Part II: Diplodactylus byrnei Lucas and Frost, 1896 D. tessellatus (Gunther, 1875) and D. steindachneri Boulenger, 1885. "
You can purchase the journal at their site
http://www.gekkota.com/index.html