Q: I refuse to check bags. Can you recommend a favorite carry-on? —Kaito Tsunashima, via e-mail
A: If you can take only one suitcase, consider the new four-wheeled Biaggi Contempo roll-aboard ($219). It weighs just seven pounds and folds for easy storage (perfect for under your hotel bed). It’s not as roomy as checkable versions, but you can always have your clothes laundered by the hotel. A fresh feel is often well worth the nominal fee.