There's the Premier run Copthorne Fishery in Pilling nr Garstang off the A6, but you have to buy their own produced groundbait etc. However, it seems to get good reports in the Angling Times' 'Where to fish' section.
I have heard that Lodge 1 at Heapey Lodges, nr Chorley has big carp in it. It's run by Wigan DAA and something like ?2 a rod.