Water -
Do not place a water bowl in the tank since most dragons wouldn't drink from it anyways. It could increase humidty in the tank which is bad for bd's.
(soak dragon in warm-hot water for 15-20 minutes, 4-5 days a week instead)
water dishes are more of a preference....i have used and still use water dishes in every reptile enclosure i have from beardies to iguanas and i have no issues of humidity and all of my dragons drink from them and along with the dishes i also soak my dragons