 Water is a key thing, too. I know that they do like to have a source of water close by, and you want to make sure it's easy they can get in and out without drowning. Yeah, I've got a bucket full of rocks, and I fill it on occasion. Of course, where do my bees go? To my neighbor's leaking sprinkler. There you go. I had everything set up. Everything was good before this neighbor even moved in, and now they want to go to the neighbor's sprinkler. Okay, ladies.