Don't be put off by the size of the water, most fish are caught within close range. The advantage of the Barrows is the opportunity to move according to the conditions, without worrying about your casting ability, which will improve no end.
Somewhere like Camely will cost you £25 for fishing three ponds, whereas a day ticket at the Tanks is £13.50 for 8 of the best fighting, and tasting, fish you will find anywhere, or you can catch and release.
No.1 tank
It's not always easy, but that wouldn't be fishing would it? There's always a chance of one of these.