Water must be accessable and esp in hot weather, if you work water must be in the house, i put big towels under the bowls and change them every other day or two days,i also have a plastic matt with lips on it, i bought from walmart, as i have five bowls on my kitchen floor, two of them go on that matt, the lips keep the water on the mat.
some people have raised water dishes, those help.
if you want to do water work, go to your nearest regional newfoundland club and find out when trainings are.
also a book you can buy from judi adler, though i am not a fan of hers, the info is enough that anyone can get started easily.
i believe it is called water play water work, something to that affect.
you can find it thru amazon i am sure or thru her website, wich is sweetbay newfoundlands.