Didn't finish the guzzler before the rain stopped so I made a small gravity feed waterer out of a 5 gallon bucket and an oil pan. It was a pretty easy build.
The link below will give you the general idea but you only need one 3/4'' drilled hole. I also put a layer of sand in the bottom of the oil pan for the microbes. One other thing, if you fill the oil pan with water and hold you finger over the bucket hole when you tip over the bucket you'll have more water in your system when you walk away. One last thing, I put a fairly large flat rock on top to help hold it in place and provide some added shade from the sun.