I bought a high sierra duffel bag - it has a zip down panel on the back and you can pull out the back pack straps…I also have a laptop back pack…

Aussie_Jacqui Article on Suitcase Vs Backpack

The trolley tour of Boston, offered as an optional, is the best way to see the entire city. Take it at your own pace, but I would suggest stopping off at the USS Constitution and Fenway.

ankopsu Article on Boston

I took a backpack on a European winter hotel tour. It was really useful to walk up the stairs to my room...It was also good to carry my luggage from bus to hotel...

snaveks Article on Suitcase Vs Backpack