We strongly recommend bringing a soft sided case or rolling duffel bag, as hard suitcases can be cumbersome and difficult to store in trains, under seats, etc.. Keep in mind that you will normally have to carry your own luggage on and off buses and trains as you make your way to the meeting point, and up and down hotel staircases. Suitcases with wheels are great (we love ’em) but may not work well on dirt or cobblestone roads.