[PaleMelanesian]

I pretty much agree with all that's been said. DCB's chart is key. Start at the bottom of the hill and apply 75% throttle and ~2000 rpm (in my experience it's slightly better than 2500). If that accelerates you up the hill, good. Cut power and coast near the top to crest the hill at the lowest reasonable speed. If it really accelerates you up the hill, split it into multiple p&g cycles. If you lose speed, downshift because you actually need the extra power. Next time try a faster approach at the bottom so you don't have to downshift.