Sorry guys but i think you will find Aldenham a bit of a let down now.
Don't get me wrong, the fishing is good, but you can only fish a very small part now.
The stages on the dam wall have all gone, no fishing there, No more boats, the fishing has gone there. The bank by the pub, no fishing there. So you only have the small section near the hut left to fish.
I would strongly take Keith's advice and fish Stanborough lakes at Welwyn garden City.
I know this is fishing very well at the moment, and you have the river lea on the same ticket.
The lake has Carp to 30lb plus, with plenty of double figure fish as back up, Bream, Pike, Roach, perch etc etc.
Normal carp tactics for the carp, Pole or cage feeder for the rest. Baits, well just about anything you like, by the way, if you should catch a Zander you a asked to kill it, but if there's no one to ask you to kill it, then do as the locals do and return it, the Zeds go to 14lb plus.
Good luck, tickets on the bank about £4.00 per day, you can use two rods but not sure if you have to pay extra.