RE: mid - late summer wading
As mentioned above, go slow and easy. Like any other still hunting, walk little and look lots. Try to keep the sun at your back and don't wear bright clothes. Watch for fins and backs out of the water, rising mud swirls, wiggling weeds, grass or pads. Many times I've been able to find one just by following up on its mud trail. Also check out areas where ducks and geese hang out. Duck crap makes great carp chum. If you see one moving, sometimes you can work in front of it and let it come to you.