Points to consider -:
Vacationers tend to be more flexible with departure times than business passengers.
Vacationers tend to have more luggage than business passengers.
Vacationers are often accompanied by children.
Vacationers are restricted to day of travel rather than time of travel, most companies only allow their staff to take complete weeks leave I.E. Mon-Fri ergo flights on Friday evening onwards outbound returning Sunday afternoon or evening would be better loaded than mid week departures.
Business travelers are more likely to tolerate busy terminals due to desired/required time of arrival, but will expect better "service".
Hope it helps
Be lucky
David