If by "one backpack for travel" that means taking said backpack by carry on baggage when on airplanes, the full sized packs have been a bit much for me. I have done it with my Hunter's Frame Kifaru and Reckoning but it BARELY fit into the overhead bins of bigger airlines. If this pack is to go into checked baggage, this is a moot point.

These days when traveling, I normally have a Kifaru Shapecharge as my carry on.