The Postscript | Carrie Classon PETER AND I ARE PACKING for our annual trip again. My husband, Peter, is retired and I write, so we are able to travel now. Getting married late in life, this might have posed some problems because Peter is exactly the opposite sort of traveler I used to be. “I’m packing two separate bags—one for Spain and one for on the way there,” Peter informs me. “This will…