I got my ds the 3 piece Stitch set. It really isn't very big -- He's going to have the backpack as his carryon - it is smaller than his school back pack, and I think the perfect size, and the waist pack in the parks. I may or may not use the duffel. I think it's more practical to save that for trips to Grandpa's and pack his things in our luggage. All his outfits are going in ziplock bags, anyway, so it will be easy to find his clothes. The duffel doesn't seem that sturdy to me. So, don't despair about the princess set. You would have probably decided to use real luggage, anyway.