Most guys will guard their pintail spots to the death, for the reasons you stated. Anyone can shoot a limit of reds down there. Pintails, well, they just take more scouting. In my experience, they typically like to loaf in areas that have a sandy shoreline. Also, if you have a dozen other guys setting up around you, odds are the pins are gonna be elsewhere. As far as wigeon and other puddle ducks, I'm still trying to figure them out. Good luck to ya!
Cigarettes are like hamsters. Perfectly harmless til you put it in your mouth & light it on fire