If you scan to show what the print would look like, i'd do whatever makes it look like the print of the negative.
If you scan to have a half-product, destined to become something in its own right (i.e. not an illustration of what the print of the negative would be like), i'd do whatever is needed to get the final result the way i want it to be.
Sometimes, though, it's easier to make the scanned image look like the way you want than it is to get a print look that way. And then what?