The difference between a river and stockton is places for fish to be. In a river most of the fish are concentrated in highly predictable areas, they are more opportunistic and the forage base is more varied and overall competition for food is more. A lake like stockton is huge, there will be a large percentage of fish at any given time shallow looking, deep, suspended, following shad, roaming flats. There is just much more water and food per fish. Also rivers produce a smaller percentage of larger fish as they grow much slower. Well...ya the reason people hang out in the cove after a tournament is cuz they know there will be a very high percentage of large fish in a small area. I am not saying that fish cant/arent recaught, I just think we as anglers are naive to think we catch all the big ones. Ask a diver who dives a lake!