Jim,
You asked, "On number 4, what is the distance to that first set of bunkers that diagonally crosses the fairway?"
It depends on which tee and where you are playing from. The photo above was taken with a long lens from the upper and back championship tee. The turn of the left corner bunker complex is 229 yards from the center of the green. This means from the center lower tee measurement of 517 yards it would take a 288 yard drive to reach it. From the championship tee above ( and I am speaking from memory on this one) as about 550+ it is a 320+ yard drive to there.
The lower base of the cross bunker (Glacier) is about 180 yards to the green from the left hand corner and 155 from the top of the rise.
Andrew, you commented, "I was actually looking at that book this morning and it was, once again, bothering me, which is why I asked the question. A number of times I've read and heard people say that the fifth is the best hole on the course and I had always thought that four was a much better hole. I'm hard-pressed to think of a better par five that I've played, at the moment."
One of the most impressive things about the Black is that as great as 4&5 are and how so many consider them the best, theer are many others who consider other holes to be the finest on the course and whose favorite ones are others.
For example, I believe 12 to be the best hole on the course and 15 is my absolute favorite golf hole in the world. Many consider 17 among the greatest par-threes out there and cite 16 as the best hole...
The number of great courses where there can be a legitimate argument as to which of 5 or even 6 holes are the best on the course, especially where that same publication that called #5 one of the best 18 ever also listed 4 of the holes as among the 500 best in the world, can be counted on one hand - if that!