I have a Eastpak rolling backpack. I love it!!! I think I paid $45. However, it doesn't go to class with me. I just bring a pen, paper and sometimes my tape recorder. I use the backpack when I go to the library to do work. It contains everything I need for the day.
Originally, I started hauling everything to my nursing class. However, we never
referred to our books during lecture. So it was a waste of time and energy. As the semester went on, the only thing I really needed was a pen and a highlighter. Or if I wasn't to awake, my tape recorder. We actually receive a packet of notes at each class. I just jot down additional notes. I beleive a lot of schools
do this also.
If you are taking other classes during the day, a rolling backpack is the way to go if you have to lug books.