Ben:
It's possible some players would play toward the bunker in Diagram A, instead of left of it, if the bunker was deemed not too penal -- if they had a chance to reach the green from it. Otherwise, they'd play left, or possibly short. But they are never going to play closer than 32 yards from the water line.
What I can assure you is, you're never going to see anything like Hole A on Tour, or my own suggestion of bunkering heavily from 300 to 350 yards. The Tour would tell the club it wasn't acceptable, and if that didn't work, they'd tell the tournament sponsor they might get some bad press out of the players if the hole wasn't changed. Your option B might make the cut, but only if it was deemed that the players didn't mind driving it down in the hollow . . . indeed, some players would think this gave them more run-out and a bigger advantage!
Also, I didn't realize your holes were quite so long. These are 500 yard holes? Are you suggesting that every hole needs to be 500 yards to make it interesting for those guys?