I think the best person who you could speak to is Pete Caton, he knows the place inside out and he will be probably be there on Sunday plus his record up there is second to none
Myself and my mate fished it a fair bit back in March/April time and did reasonably well fishing pellet up and down in the water.
However though this may work on some of the lakes, but I think you will need to take worm and caster or meat. It really changes day to day so I would ask Pete for his advice. Bread can also work, if you speak to Bob Avery or Paul Newell, they might be able to give you some clues how they fish it with bread
There is a tackle shop onsite but I don’t think they sell worm or caster.