All I fish are big shallow lakes with tons of grass, and the Everglades. Things I have learned over the years is that not all grasses are the same.
Look for the greenest grasses you can find. They are pumping O2 into the water.
An isolated clump are better than a huge clump, because bass will congregate there rather then spread out throughout. You may catch several off one clump, usually about the same size.
Grasses close to moving water are great ambush points for bass.
Grasses close to visible structure can be home range for bigger bass.
After the spawn, grass lines close to significant depth changes are great places for bigger bass usually deep recovering.
Two or three different types of grasses together are better than just one type of grass in mass.
When fishing always watch the grass stems that move when not caused by the wind. Something alive is there, might be a bass, might be a gator or snake.
When the sun is high look for the thickest greenest clumps and punch the area. Bass are seeking shade and bigger ones will control the prime areas with the most shade. Specially in summer.
Lilly pads fields will all face the same direction in stiff winds. Make sure the V at the top of the stem is facing you and your baits will come through the field without hanging up. Facing the wrong way will be a pain in the ass.
I hope these tips help, they are always on my mind when out in the swamp.