As the evening progressed, the Sheep came down the mountain one or two at a time, until it seemed like the whole hill was covered with them. It took them quite some time, and I felt like every one of them was staring at me in the blind, but eventually, they came down inside the fenced area. Best guess is the area inside the rail fence is a couple of acres.
There are two water trays, but only one appeared to have water. I was set up at the far end from where these Sheep are. I could see the path to the tray with the water at my end. Never did see them come to that tray, so there must have been some way for them to get water at the other tray that appeared to be dry.