Not a bad little album for the cost ($7).
Who are the whistle players?
I just has listen to the samples at Amazon - 3 out of 5 samples are played with a very strange sounding tine whistle - are these the famous Irish Bagpipe Whistles?
Who are the pipers?
The piper sounds like Seamus Ennis, though this is just judging from samples as well.
It is Ennis, as the first track, "A Little Bench Of Rushes" is also the opening track on his album The Bonny Bunch Of Roses.