Yep, this is the MAC. If the school is within say 4-5 hours, it's almost always bus, or buses in this case. And thing of it once you get to the hotel, you've got to make sure that the hotel has all of their food supplies, staff for dinners, etc there as well. Not to mention any of the support staff on the Buffalo end too. you still have the logistics once you are on the other end. After all, it look like several major interstates are still closed (as of 7:00pm Friday), how would the team even get to the stadium.
So, could they have left 48-72 hours before the game? Sure. But that's only part of what it would take to put on a game at UB.