andrew pack about 6 diapers in your carryon bag and the rest in your checked baggage and whenever you change your diaper do it in the bathroom and put the soiled diaper in a grocery plastic bag and put it in the trash can in your room,lavatory trash can ect. be discreet with them and hopefully your roomates will understand your condition if they do not then your roomates are not really true human beings they are really heartless people. you have a condition that people should not laugh at nor make fun at, these you can hide now on the other hand people with glasses and braces cannot hide those you are a wonderful person and do not let this condition stop you from going on your class trip. i have travelled all over the world while wearing diapers so you can be rest assured you will be ok. just be yourself and do not bring attention to them and no one will notice as long as you are not wearing attends fitted briefs you should be wearing depends fitted briefs the attend are perfumed laden and are too tall for your pants and shirt. you will be fine.