Swinging harder with a longer club almost always leads to bad shots.
Some players like to change clubs around the green to hit high or low shots. I play all of my short-game shots with my 54-degree sand wedge and change my ball position to hit it higher or lower. I think it's easier to learn one club than four.
I almost never hit a shot all out, and I make a conscious effort to swing my long clubs just as I do my wedges. Keep this in mind when hitting your fairway woods.
Experience is going to be big, even more than it used to be, because you're coming in with longer clubs and you've got to hit certain areas more than you used to. Over four days it's going to narrow the field dramatically.