Right now I have only one waterer in the run, the heated dog bowl. I unplug and dump it every night at lockup, and plug it in and fill it every morning. I carry out a gallon (milk) jug, and that's all I have to worry about for the day. I have the bowl up on a cinder block, so it stays pretty clean.
When I don't have to worry about water freezing, I have 3 waterers out there. Might make it just two next spring, since one seems to be enough now.
Dreamz, congratulations on your weight loss! It's not easy to do.