I have fished there before for carp and never had a touch, every time i went it seemed to hav just finished producing a vast ammount of fish to everyone but went dead the day before i arrived and no one on the place caught anything the whole time i was there.
There are supposed to be some nice pike in St johns lake and i think there may be some cat fish in one of them. one thing i do know is the bailif is probably on of the most helpful people in the country if you can get him talking.
there's also a linear thread on this site maybe if you look at that you might find some contact details.