If you've know as few as even 9 other people you'd like to share your vacation with, you might have enough to start a group and reap the added benefits which can be found in a group cruise or group tour.
It may be as simple as having a whole departure to yourselves, turning a regularly scheduled tour into a private tour, but you might qualify for some savings right away.
Odyssean Travel will work with you to find a preferred professional fee rather than separate rates for each space at double occupancy.
But as the number of guests rises, so too may the benefits. For cruises, it may start with added onboard credit or a private cocktail party, but private excursions and experiences aren't unheard of. Even all-inclusive vacation packages can sometimes result in bonuses or added features you'd never get without the purchase power of a group departure.
Just remember that each supplier company or cruise line is different, and different departures or itineraries can result in different outcomes. Group travel is often excluded from promotions, for example.