I don't fish for redears much, and don't fish bluegill much after they bed. But I really enjoy fishing for them in late winter through spring (say from February through early April), and I'd say they behave in a similiar fashion during the late summer. I've learned a little more about doing that this year in a few lakes in Arkansas, but have also caught a lot of winter bluegill on Barkley and KY Lake. For me, the trick has been to find fish holding around some kind of cover in deeper water (but not necessarily super deep for bluegill; most are 5 to 10 feet, it seems). Often as not, there are a few fish around any given piece of wood cover, and on the big Kentucky Lakes, they seem to gather around rock piles. I have the best luck vertically fishing with a tiny jig and piece of nightcrawler or waxworm. I drop it all the way to the bottom, then pull it up about 6 inches. I fish my way up, moving it a half foot or so at a time, to about 3 feet deep or so until I catch a fish or decide they aren't in that spot. Most of the bites are so light I'd never be able to feel them by casting or watching a bobber, and by fishing vertically, I think it gives the fish more time to ease up and examine a bait before biting it.

I don't know any of this for a fact, but it just seems to be my experience. Those fish are really good to eat after a long, cold winter. :D