Re: should I do a newspaper combination in the evening?
Can do any time of day. If other hives are nearby returning foragers will eventually find their way into them but just don't leave anything they might cluster on where the old hive was.
Other thing, make sure the top unit of the combine does not suffocate or cook. I make a finger sized hole in the middle of the newspaper, and something as simple as a bit of cardboard over the lid can keep the sun off. Depending the condition of the hives I may also put a temporary queen excluder between the combines to stop the queen walking into unfriendly bees before they have got to know each other.
"Every viewpoint, is a view from a point." - Solomon Parker