If the aforementioned presentations are just too 'meaty' drop down to a colored Aberdeen hook with a split-shot or a Shearwater Powerball Jig. Aberdeen hook teamed with maggots or wax worms. Back up your jigging line with a well-thought out setline. The flowing tentacles of ants and spiders have a way of encouraging hits even while hunkered beneath a float. Rod, Reel, and line choice doesn't deviate from what you've been using all winter.
Giant bluegills are truly something special.
And by selecting a promising lake and employing certain techniques it's possible to track some dandy fish. But as I stated at the onset, hefty bluegills are rare, and it's your responsibility to practice conservation.