Good info above. IMO, "bedding areas" can be quite large, i.e. a swamp vs. a specific spot. But within that swamp will be the areas they prefer to bed. And yes, it varies with season & wind & hunting pressure and other stuff. I must add that deer often vary bedding behavior with food availability, or in areas that aren't really what you'd think of as bedding areas. Example: they may bed very close to, if unpressured, a field when it's ready, but move on when it's done. But as you hunt, you'll learn to recognize these.
I hunt woods, not farm areas, and I'm often setting up pretty close to bedding areas. I do so knowing too much activity will move deer outta sight pretty quickly, so I rotate stands, hunt the wind (always), and since I don't hunt fields or food plots, I hunt almost exclusively during the relatively short rut. Doe bedding areas (thick) and travel routes near them along water, drainages, or swamps are often great rutting spots as does are pushed by bucks. That's where I hunt probably 95% of the time I'm out.