Been using them for a few years so I guess they're used to them. I move them around every few days and they go straight to the pan. Actually I don't think my scent bothers them much it at all either. Seen them sniff the ground where I'd walked just a couple minutes earlier then go straight to the chow while barely raising their head.
Water isn't a problem unless it gets very, very, dry. Off to the right about 50 yards there is a spring that runs year round, then off to the left is a steep hillside that also has several seeps and springs. At the bottom of that hill there is a creek that hasn't gone completely dry in the 20 years I've lived here.