Puzzling over how large a bag can be used as the "personal item" to be stowed under the seat on a Delta flight. Thinking about using a Vera Bradley Weekender, which is technically a couple of inches larger than their stated dimensions for Delta. But the bag is squishable, and won't be packed to capacity. Could also use the Small Duffel, but the Weekender has wonderful pockets which the duffel doesn't. Using a rolling suitcase for the "Carryon" to be stowed in the overhead. Anybody have any experience using a Weekender--or being told it was oversize?