Hi, I'm just a newbie myself but this is what i've learnt.
Cresties are okay at room temperature, but you can add a heat lamp if you want. For example, I keep mine on all the time, and my tank stays at about 24 degrees. =]]
the 45 x 45 x 60 Exo-terra, is a great viv for two or three adult cresties IMO
