You got pictures of that we can see? Sounds do-able to set a barrel in/near a spring.It's a bit climate dependent. Here in the frozen north we use 65 gallon plastic drums set in the ground with a spring feeding running water to them year round. A shroud around them creates a micro-climate. This works well with our mountain springs. On city water and in a warmer climate nipple waterers would probably be better. They can be hung off a drum setup on a pedestal.