Ardent followers of the tenet ‘Well, you just never know,’ we’re not the types whose weekend gear will fit in a tiny backpack. And so the crew at Biltmore-Green has come to know us by name. The Back Bay shop has our favorite high-end Tumi and Hartmann rollers; durable Samsonite and Swiss Army suitcases; and leather totes from Bosca and Jack George. If your packing preferences lean toward the aforementioned knappie, well, you can buy simple, sleek carry-ons here, too. Just don’t complain if you wind up needing the shoes you left behind.