This would strongly come down to the consideration of the presence of nuisance species in the lake. Particles such as corn, pellets and naturals like maggots offer a lot of appeal to a carp, but are far easier for smaller species such as roach / rudd to peck away at and clear your bait out, as well as the hookbait. Boilies Boilies are far more selective for carp and easier to apply with the aid of a throwing stick or catapult.