Try to fish groundbaits that have a low or no salt content.Do not know why but have found fish shied away from salty gbs.put plenty of particles into the feed and as ginger has said take plenty of plain crumb with you and give it to them big style.
Always ask around before fishing and remember try to speak to people in there last days of fishing.Everyone wants to catch fish but those who are catching do not want you turning up on there prebaited pegs before them in the morning so they can throw you off track.If they are staying in one area then chances are they are catching.
50/50 brown crumb and Silly bait "fish meal" works a treat for bream bashing on lakes upto 12 ft. make the groundbait fluffy, so it explodes form the feeder.
Big Bream love fishy smells. sweet smells such as brasem works well also.
When you pre-bait use VDE micro Pellets "fish meal" instead of casters in groundbait its cheaper and just as effective.Mal.
Last September myself & two mates had a very successful week on the feeder (mostly) on Lough Derg, using plain brown crumb,plenty of trout pellets and Vitalin. This is a dry cereal based dog food with loads of particles.It soaks up loads of water(we found it best to pre soak it for about 5 mins before mixing it into your crumb.) It was marvelous stuff. It stiffened the mix up, it can carry more particles if required,it has a high food content to keep the fish, it makes it easier to catapult at distance and its cheap. A great big sack, approx 20kgs, from an animal feed merchant, was about 8 quid. (we took it with us) The three of us are back in Ireland in the Autumn and we will definitely be taking a few sacks of Vitalin. Its great for the Bream.
Hope this helps.
PS Dont buy the mix with added gravy. Just the regular plain ceral Vitalin.