Hi mark, why don't you give the wardens a ring. The times we've been there they have been nice and helpful.
Once I misjudged my arrival time so we pulled into a services. My wife had the idea of ringing them and they said there's no need to wait, we could go to the site there and then.
Once when walking around the first lake I saw fish basking out in the middle but it was too far to identify them. My gut feeling was they were carp but they looked more like large trout.
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