I would reccomend using a backpack, especially if you plan on using a lot of public transport or walking a lot in the cities. A backpack is a lot easier to deal with than a suitcase when you have to walk a long distance or up/down stairs.
Plus, you'll look more like you know what you're doing.
Since you are Canadian, you will also be required to prominantly display a Canadian flag on your backpack, lest someone assume you're American.
From experience I would definatley reccommend a Backpack , especially if you are getting on and off transport and staying in hostels ( much simplier to lock up your belongings if needed).
I had a backpack which opened up like a suitcase which was fantastique! Just shop around bud . Have an amazing trip! Dannii x
i agree with all of the above. Go the backpack definitely. If you buy a travel pack, they open up like a suit case - making it easy to access your stuff.
enjoy your trip!