“Don’t you wish you could take a single childhood memory and blow it up into a bubble and live inside it forever?”— Sarah Addison Allen, author of Lost Lake.“I get sleepy riding in cars,” a friend admitted as we embarked on a road trip a couple of weeks ago.“I don’t sleep in cars anymore,” I responded. “I did a lot as a child. Especially at night. Stretched out on the back seat. Or in the back of the big ‘58 Ford station wagon my parents had.”But I never sleep while traveling in a car now.Which is different than sleeping while ...