I too am in school right now, so I know the difficulties of traveling back and forth with fish. I am about 4 hours away from home and have been doing the back and forth thing for 2 years now. I have 3 tanks, one 2 gallon, one 5.5 gallon, and one 10 gallon. The 10 gallon is obviously the most difficult to move, though it is also a NPT. I also just set it up about 2 months ago, so it has only been moved once. Personally I would not want to deal with having the girls have to reestablish themselves after every move. I don't plan on setting up my sorority until I am living in a more permanent place, as much as I want to. However, if I was going to a school that was really adamant about only having one fish tank I would either get the 10-15 gallon sorority, or a giant for the larger tank size and just plant it like crazy.
Though that being said, I LOVE planted tanks. I couldn't imagine having a tank that wasn't planted at this point. I almost love my "underwater gardening" more than the fish! Though I also think of them as my little swimming flowers. :)