id start by chumming up a hole with some bait. use a can of sweet corn or whole kernel corn carp like it. wait a day and go back and fish the same spot. they should be in there. use the same kind of corn on your hook, drop it in there an let them have it!. good luck
In my experiences ive seen the larger ones patrolling areas around dams. on a fishing trip on the Mississippi river while waiting for a lock to open up I saw a group of boats nestled up around the lock. From the looks of it they were all pulling in what looked to be carp or possibly sheephead. We never did make it over there to fish as we were chasing schools of walleye that day.