Thought I'd add a swamp comment or two... dan mentioned that at times both sides of the transition will have thick cover and low visibility. This happens a lot in most of the swamps I hunt. If you look at the red transition line that dan marked, for example, I would most likely find tagalders on the creek side of the transition that are so thick there is no visibility. When this happens, the bucks often will use the beds dan marked in yellow with several different wind directions rather than being "wind specific." The cover is so thick / wet / nasty that the bucks feel safe there and they are exceptionally difficult to approach.
Yet another buck bedding area in these swamps are tiny islands, maybe 3-6 acres. If the islands have some mature timber, the bucks like to bed on the upwind edge of the island and watch down through the mature trees that have little undergrowth. To summarize the island approach... they like to travel toward the island along a transition like the one dan marked in red. When near the island, they will break off onto a run that approaches the island (unless the transition goes straight to it). Once on the island they like to hook downwind and scent check their intended bed on the upwind edge of the island. They then move (often, anyway) straight upwind to their bed on the edge of the island. When you find the bed, you will see their advantage... good visibility downwind and the brutalness of the swamp behind them. These beds often have "more to them" than just the upwind edge of the island. There may be some trees blown down there, or a small and very dense thicket is adjacent to the bed, or the island juts out into the swamp on a small "knob"... you get the idea. If a predator "tracks" them by ground and airborne scent to the island, such as a wolf, they follow the bucks entry route which puts them in plain sight of the bedded buck and he dumps off the back.
These island beds will be similar in appearance to buck beds that you may find on the end of a point that juts out into the swamp... except that they are on an island. It goes without saying that if other hunters have been on these very tiny islands the bucks bed elsewhere.