James,
Ditto what Tom Doak said.
I have used both 850 and 900 feet in the last year as "Turning points." If I am doing a 7000 yard plus regulations course, or one in the mountains, I think its time to go to 900 feet. I am doing a nine hole course right now, and will use 800 or 850, since I can't imagine enough long bombers playing to justify going longer. Even for championship type courses, I try to remember that it is only a dozen or so guys on TV launching it 325 and more, and they don't do it all the time. Even at 300 yards, its probable I will catch long hitters on the fly, while "average" 300 yard players
will roll in!
Like Tom, I rarely purposely dogleg a hole short of those turning points, as some golfers just can't force a fade or draw, and they feel like you've screwed them. I also am against sharp doglegs, perhaps since the first course I played was Medinah No. 3, and it took a lot of critiscism for its sharp left doglet 13 (now 16) and sharp right dogleg 18 (now defunct) My mentor used to say, "There are only two instances when I won't use sharp dogleges - when there are a lot of trees and when there aren't!" A clever way to sum up the problems of hitting short in woods, and having no defense without trees.
We tend to use the same measurement on all holes other than par 3's just to avoid confusion. However, that doesn't mean all fw hazards automatically line up at that point. I try to consider prevailing wind, uphill/downhill and topography factors. Even then, I would stick a fw bunker in the natural slope, even if it was a few yards long or short of where I calculate the drive "should be."
I play my own courses, and can often remember where the pole marking the turnpoint was. I don't recall ever seeing a divot right at the old pole location! Golfers vary so much, that assuming every drive will go exactly 266, 283, or 300 yards and placing your hazards to precise mathematical measurements is not going to bring those into play more than other locations nearby.
BTW, I have played golf with Forrest Richardson. We always used to call out after his tee shots "Run Forrest's Ball, Run" which I think a movie director must have heard, and incorporated in a movie some time back........