Putting the water on the warm end should raise humidity........are you using an UTH(under tank heater)? If so, placing water dish partly over the uth will help keep it warm and the humidity rolling. If not, you might want to pick one up. As far as I know, pretty much all of us use them either by themselves, or with a light. Speaking of light, I use an infrared bulb(100W) and a uth. The bulb is on 24/7 and the uth is hooked up to a dimmer switch for control. The tank is a 30 gallon. Xaero is about 22 inches or so. Doesn't seem to mind the red light at all.
Sounds like you lucked into a nice animal! Post some pics soon's you can!