i've been to sandhurst a few times now, all swims are capable of producing fish on their day, the carp show themselves a lot but you can't always get on them because the lake is so busy.
the mags have been recommending maggots and maize for what seems like forever which is why i always take a good quality boilie with me as well, all my fish so far have fallen to odyssey xxx but any good bait will work, the water has a lot of big fish and they need to eat so you'll always be in with a chance if you can get on them