Your son's conference is 24 max for conference road games and they will likely take up to 27 for non-conference. Keep in mind that it's not like they decide at the start of the year who those 24 or 27 are going to be .....the decision's usually not made until a day or two before each roadtrip starts. Injuries, pitching rotations, etc can determine who goes and who stays home. Spring Break trip will likely take everyone.