....if someone has to drive home or any distance, limiting it to one and one only is probably the best way to go....
....Fishing, OTOH, is an entirely different matter. My consumption there is only limited by maintaining balance in the boat and the need to be sober enough to pass a DWI test if I'm at the helm. But I'm not out in the ocean or exceptionally big water, either.
I believe there're many small water places that treat on the water DWI similar to on the road violations. Might not be the best game plan even if one could get away with it. I don't mind a drunk boater doing themselves in, I'd just hope it wouldn't involve some other unrelated person.