Travel writing can be tough, despite what you might think. You’re jotting down notes about the beautiful sunset, rather than just watching it. Coming up with the right words is a constant struggle. And still I wonder with great envy how Toni Bentley, a ballerina and author, landed the plum assignment of reviewing the Royal Mansour hotel in Marrakech, Morocco, for the Wall Street Journal, which, according to her description, sounds like the most opulent and extravagant hotel in the world.