I hunt a place in Alabama that has a lot of water. Swamps, sloughs, creeks, lakes, you name it. My experience has been that the birds that live in there pay less to water than the ones on dryer ground. For example, I've watched many turkeys, even groups of them, walk to the edge of a slough that's 75 yds wide and flap twice then glide over to me. Most never even broke stride. I generally have two strategies. If I can get right to edge without being seen, I try to call them to ended and shoot across, if it's not too far. If I don't think I can get there, I stay back about 100 yds from the edge. If you get too close they can land right on top of you or even fly past you. Neither usually works out real well for me. I've also noticed that they don't seem to like water that is flowing very fast and usually won't cross it. Also these birds almost always roost over water. If you pick right side, you've usually got a pretty good chance. Hope this helps and good luck.
