As with flats, bigger bars tend to hold the most fish. The perfect bar is a submerged irregularly shaped extension of dulled shoreline point. During daytime hours expect to find bluegills suspending along the bar's edge or just beyond the break out into the flat. At dawn and dusk it's quite common for bluegills to forage over the top in 5 to 15 feet of water. Remaining weeds and oddities such as rocks will draw even greater numbers of bluegills to use a particular bar.
Subtle humps are the third defining structural objects in a big time bluegill fishery.
An example of a prolific hump would be one that rises to a peak of 10 to 15 feet of water from a surrounding 25 foot flat. Work the hump's crest and breaks in the morning and evening. In fact, if you chance upon an interesting hump during the day, but find it to be void of fish, don't totally discount the structure. Instead, return at dusk because there is a strong chance bluegills or crappies will move in. A 10-foot hump rises from a large 24 foot flat.