Let's continue this just a bit longer, despite boring the rest of the group.
When I say 220 yards to carry the bunker, I mean the actual distance. It's been a couple years since I played there, but I would guess the back edge of that bunker is about 145 from the center of the green, hence a 223 yard, slightly downhill carry from the back tee. Into a 10 mph breeze, that requires a solid, low drive. I tee it low, and really try to belt it. If you miss the line by a few yards right, the ball will still funnel down to the best spot.
I've played Pacific Dunes about 20 times, and decided upon the aggressive strategy after 10 or so rounds. I've succeeded 3-5 of the last 10 attempts, and though I may be exaggerating about the gap/pitching wedge approach, I still think it's a low 9 iron or pitching wedge.
I'm 48 years old, but still a reasonably strong player. One of my younger friends is a ridiculously long hitter. One time he and I were playing in a pro/am best ball down at Pacific Dunes. On a calm morning, I saw him hit one 5 yards short of the green. The guy is all over the place, but when he hits one, it's something to behold. 320 yard, low screamers. I believe he made par.
I only call #2 a short par 4 in the context of this thread, a great hole under 400 yards.