Your first journey will probably be without inner bags for your cases. By the time you're back home, you've been lugging heavy suitcases around in hotel lobbies, lifts and on stairs, every day. And packing and unpacking your cases is a different puzzle every time.
After that first experience, you'll be looking for inner bags. With inner bags you leave the cases on the bike, and just take the bags out. Flexible and light, and they come with a handle and removable shoulder strap. They're a lot more convenient.