So, you dont actually need bluegill to craft predator bait. ANY gritty fish will do. But if you want to catch bluegill, here are a few tips. They dont seem to be as aggressive as other small fish, quite often I will ignore the flashing icon indicating that I should reel the line in and I dont press RT to flick the line. Both those things will attract the rock bass, perch, and chain pickerel. They are attracted to cheese bait, but will strike bread as well. I've had lots of success in both rivers and lakes, but here are my fav spots: Dakota river (any stretch), Southfield Flats and Mattock pond, Moonstone pond and Lake Isabella. They are everywhere, so technique is everything... goodluck!