Living in WV I've watched my
scangauge a lot. The best way I've found (automatic transmission) is to have speed when you start the hill and bleed it off a bit as you climb the hill. Letting go of the gas completely JUST before the peak and coasting all the way back down.
This method is almost as good as a level straight.
In fact, I might go do a few
scangauge tests right now and report back.