Bolton Abbey used to be fantastic fishing but in the last three years I fished it(4 or 5 years ago at least) there did not seem to be any hatches in the evenings and hardly any fly life at all

Combine this with the new(no) stocking policy and the fishing became really lean.
Saying that you could fish hard all day and catch zilch. Fish an hour into darkness and it would be a different story.

Mark, the river keeper, is a nice chap and helpful, though not as mobile since his unfortunate accident

Never fished Kilnsey but they do say it is grossly overstocked



Burnsall is nice, gets quite wide in places too.
Nidd is available on day ticket, season ticket very reasonable too(price of 5 visits to the Wharfe)
Check out the river accademy dvd for tips on the Wharfe.