Bear in mind that the Ivies generally try to keep missed time due to travel down. Re the Princeton schedule, the Orlando trip is the spring break trip not during the semester. Also the xc schedule is typically alternate weeks with only a couple of long trips. During track season there are several meets at the NY Armory track, Navy and Penn State so usually a Friday afternoon departure and return the next evening. Many students at the Ivies participate in extracurricular activities that take them away from school, model UN, orchestra etc, it's not just athletes.