Hundreds or thousands of quasi and real homeless people use services in the French Quarter every day. I rode my bicycle there to check out the resources. In the future, I will remain farther afield.
The toilets in the French Market look like they were donated by a prison. The drinking fountains are reluctant or not working at all. It took about ten minutes to fill a jug full of water.
Here's what I do: I let the water trickle into a smaller water bottle, then I transfer it to a bigger one. The process is tedious, but I am not busy. Anything to save a buck.