G'Day!
Screens are by far the best way to go, or a specially folded map as someone pointed out. Reason being that the foggles or hood are not foolproof, and as honest a guy as you may be, if your shooting a VOR or NDB approach and you catch a glimpse of the runway out the corner of your eye, it becomes difficult not to make a correction if it is needed. With the screens you cant see s**t, so no room for that happening!
WJ