I’ve traveled extensively and, honestly, I would never use most of these suggested bags with the exception of the PacSafe and Travelon. The bags must have security features like wire lined straps, hook latches, scan-protected pouches, etc. It’s fine to use a crossbody as long as you have the right strap that can’t be easily cut and place your hand across the bag at all times and inside your coat or sweater when in public places. Never ever consider using a backpack. It’s a sure fire way of getting ripped off….
Hands down, the easiest duffels to pack, unpack, and rummage around in are those with a large, U-shaped opening. Duffels such as the Patagonia Black Hole feature this design: a zippered flap extends around three of the four sides of the top of the duffel and opens to reveal most of the contents. These bags provide easy access whether in a hotel, tent, or on the road. Other bags, such as the Filson Field Duffel, open in a more traditional style, with one zipper that extends across the top of the bag. With a smaller opening, access to the contents is more limited, and especially when full (this means more rummaging and disorganization). If you’re looking to prioritize convenience above all else, large roller duffels like the Osprey Shuttle offer the most rigid structure and largest opening for packing and unpacking.