On Bethpage 9 (similarly 5), if you do have enough club to reach the green, go for the fattest part of the green, typically away from the pin, with all the backspin you have. Then you may be able to hold the green (not always!). If you do sometimes the putt at the 9th, although long, will be dead straight.
PS. Most important tip for Bethpage 9 is to drive well to the right, so your ball does not feed down into that collection area in front of the fairway bunker. If you stay up on the fairway, the rise in elevation to the green is minimal, and an approach shot with enough distance and backspin should hold the green.