"Nowadays, people want to be much more off the beaten track," Morgan-Grenville said, describing the trips. "The whole ethos of the baby boomer traveler, you can't cookie-cutter your services. Everybody wants something different."
That means that while there are 48 people on the tour, several small private side trips are built into the itinerary.
Morgan-Grenville said that his clients don't want to travel halfway around the world to go to a tourist restaurant.
"It's going to a little bistro that's tucked away down an alleyway that's not in a guidebook that doesn't have white-glove silver service," he said. "It might be a mom and pop little restaurant with four, five tables."
Morgan-Grenville explained that travelers today want to see more and more remote sites. But the farther outside populated areas they travel, the harder it is to find upscale amenities. In some places, Abercrombie & Kent has to fly in its own sheets and towels. Other times, creature comforts are sacrificed to lend a more "authentic air" to the experience.
"You can go and stay at a Four Seasons wherever you want. Today, it's not a novelty for people to do that. What is a novelty is having an incredible experience in an incredible location," Morgan-Grenville said. "The previous generation, they were very happy to be shown things. These guys, they don't want to see something. They want to participate in it."
Other parts of the travel industry are also expanding their ultra-high-end products.
The Four Seasons hotel in New York has two presidential suites that cost $15,000 a night. The company won't provide detailed occupancy figures but says the suites are rented out more than half of the nights in the year.
For the past six years, the Four Seasons has been building a penthouse suite that will rent for $30,000 a night when it opens up this summer. The 4,300-square-foot room will have 24-foot floor-to-ceiling windows and cost $45 million to build, according to the hotel. Few details are being shared about the project, which will first be unveiled to the world in the pages of Architectural Digest.
Just a few blocks away, the Peninsula offers a two-bedroom Peninsula suite for $15,000 a night. If you've got a large, well-heeled group, a connecting suite can be added, bringing the nightly bill to $17,500.
If those rooms are booked, a rich guest can try the Mandarin Oriental across town, which offers a 2,640-square-foot presidential suite for $14,000 a night.
For those looking to escape the city, the Four Seasons Resort Punta Mita in Mexico offers a five-bedroom suite for $15,000 a night. The 9,150-square-foot suite offers its own entrance, a private gym and spa treatment area, home theater and pool.
"Entourage travel is a growing segment, not only among celebrities, which we certainly get our share of, but also among families and business groups," Christian Clerc, regional vice president and general manager for Four Seasons said in a statement. "Those typically traveling with an entourage seek privacy, luxury and the finest experiences the resort has to offer.
Representatives of the New York hotels said the suites were most often booked by families.
For those who want to travel and stay on the move while catching some sleep, there are also plenty of top-end options.
The Venice Simplon Orient Express has long been known for its luxurious train travel.