Most of my better ones have been caught on fresh prawns or plastics (prawn imitations).
Suggest using little or no lead if possible when fishing in calmer waters. They can be very finicky biters at times and love to just grab the bait and run. At other times in running water they absolutely crunch the bait.
Well worth chasing though, as they are tasty little critters!
Cheers,
Roo.