I have been visiting this place on and off since I was a teenager as it is on just off a lane that runs between Chippenham, where I lived and Corsham where I went to school. On hot days, Rex, my old dog used to love splashing around in the small pool and stream, getting soaked through (mind you he would do that on cold days too!).
The area is a lovely and popular spot for a picnic (the power lines spoil it a bit though) but can become very boggy, especially if the cows are in the field so like the article says, bring your wellies!
The stars were in plentiful supply back in my younger days but seem to have become more difficult to find over the years as more and more people find out about the well. However, I would imagine all this rain has help 'loosen' them from the spring somewhat making finding them a little easier.