From an elevated airplane outfit to a comfortable look to walk all day in.Credit: Travel + LeisureMy motto for spring and summer travel is to pack comfortable, low-maintenance outfits that’ll have me looking effortlessly put together no matter where my family is headed. And, because I’m married to a diplomat, my travel outfits often need to be versatile enough to look refined, depending on the occasion. Implementing a “less is more” packing appr…