Sure, luxury travel might occasionally include caviar and castle stays. But high-end group trips are about more than just upscale hotels, dining and experiences. The difference between a standard group trip and a luxury one is baked into the DNA of the trip, from start to finish — it’s in the group’s size, how you communicate with them, how the itinerary is structured, how well you pick your employees and vendors, and how well you plan for rainy days.