Rural Gardening: My water tank is being overrun by honeybees, 2 by Mountaindweller

Mountaindweller wrote:
I live in the mohave desert, and far from any known water source for bees besides the 50 gallon water tank I keep filled for watering my plants. I don't mind sharing with them, and so far the only sting I've received was from trying to rescue a drowning bee(ungrateful little monster!) I had two questions...how far from the hive will they travel for water, and is there any way to give them a more attractive source?
In these pics you see a watering can that I stuck a stick into that they really like to use to get down to the water I put in there thinking they might prefer that...but there are so many they still use the tank. And the screen in the tank is there to keep the drowning down to a minimum. A those black dots in the can pic are bees!