Shooting docks is a blast in a kayak, you worry less about boat control and bumping into stuff and more about fishing. Take a look at Google Earth for areas along the rivers that are flooded during high water, but cut off again during normal water hight.

When I lived in Missouri I found some old gravel pits on national forest land that a river flooded into during high water. The local state fisheries biologist told me that he went years without even getting a single Crappie in surveys on that river because their numbers were so low. The first trip I made resulted in a limit of 30 Crappie. All 30 were 14 to 16 inches. I didn't take any photo's and no one believed me! That's what got me started snapping photo's of my catches.