to have the hives facing the east so that the first sun lights hits the entrance thus causing the bees to start their foraging day earlier or to have the hive slope towards the entrance? One of my bee yards has a small slope to it and if i don't elevate the downward side of the hive stand, the hives slope away from the entrance. I can turn the hives around or raise the back of the hive stands. But since most nectar flows don't start much before 9:00AM, how much difference does it really make?

This is one of those "problems" that is easier to think about rather than solve. Not that either turning the hives or jacking up the back of the hive stands would take long.

How much effort do commercial beeks using pallets make to ensure that the pallet is level?