SFO Airport/San Francisco. 3:00 am PDT. Three of my granddaughters (ages 7, 11, 14) and I are flying to the East Coast. Their 17-year-old sister is already at our house. Accustomed to flying together, the girls and I are a moving combination of jocular and somnambulant. We have a 5:00 a.m. departure with a connection to make in Denver. Ever…