Oh yay, another subject to be cussed and discussed - hopefully nicely! 
Water in the cage - I've seen, read, and heard both yays and nays. However, has anyone ever tried the automatic waterers like rodents use? Granted, dragons are new to me, I'm only just beginning to gain the experience of owning one, but I've read hours and hours about them, researched on more sites than I could ever remember, and do have experience with reptiles, in general, along with many other animals. Before the laughing starts, open your mind and soak in the reasoning behind the curiosity.
While many dragons do drink out of bowls, they are usually more prone to drink from a direct source at their mouths than a waterbowl - a syringe, wet finger, waterdrops directly in front of them, etc. - by licking with their tongues. This is what I have gleaned from many posts and info sites, along with what mine does, please don't jump down my throat if this is not the case with yours. (A shame that I have to say that, but I've never seen the turmoil on an animal site like I've seen on this one, and would rather not be part of it.. lol) Their heads and body shape seem to be shaped more for the in-front-of-the-mouth way of drinking rather than standing at or on the lip of a bowl and bending their necks down to lap. That lends me to believe the action needed by a beardie to drink from a tube with a bearing dropper would be easy and it could be positioned right at licking level, very slightly raised. Even the drops it might miss would drop into the bowl, and if it is emptied daily as water should be, all that would accumulate would be so shallow it would give more of a surface wet that most seem to like anyway.
On the humidity issue, an automatic waterer would not really add much to the enclosure because it would only release small amounts and what leaks before, during, and after a drink could be caught in a small dish no different than those that keep water in the enclosure anyway. I've found in mine that the basking area cuts out the humidity issue because the heat dries the air.
There are waterers made out of plastic, so safety with glass breaking isn't an issue; although, picturing it in my mind right now, I imagine some dragons might try to climb up the sides. Surely it would learn not to, maybe not. Which brings me to my last point...
Dragons are intelligent creatures, full of curiosity, adapting to habit and routine, and definitely trainable.
Anyway, maybe it's totally unrealistic, but if anyone has tried it or has input, it could prove an interesting topic or something worth trying.
P.S. I know that a properly hydrated dragon using greens, misting and baths does not need water in the cage, but that is a separate topic and not what I'm intending to get feedback on - I've read lots on that one, and like many aspects of husbandry, differs from one keeper to the next.
Like I said, open your minds, I don't think it's all that crazy!
Denise, the mom half
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Denise (Mom) and/or Jared (son)
Take care!
1.0 Bearded Dragon - Merlin
2.0 Chinese Fire belly Newt
1.0 Black Cat - Shorty
1.0 Anery Kenyan Sand Boa - coming soon (completing brumation with present owner before joining our home)
0.0.4 Tanks waiting on us to decide what is going in them! LOL
