The Vanguard Heralder 51T combines the conveniences of a backpack with the travel-friendliness of a rolling case. At almost ten pounds it’s no day bag, but it is equipped with loads of compartments and pockets, a large removable interior tray, tripod sling, laptop storage and a rain cover. Is it the best of both worlds, or would you be better off with a dedicated backpack or roller? Read our review