You have three options for a ceremony for two: join an open group with other participants, book a private duo session at one of their locations, or book a private duo at your own place in the Netherlands (home, Airbnb, or holiday home). You can also put together your own small group, such as two couples or friends.
To see current dates and reserve your preferred option, use the reservations page: https://triptherapie.nl/reserveringen/.
After you request a date, complete the online intake so your booking can be reviewed and confirmed. If you need help choosing a location or accommodation, you can ask for advice.
Hope this helps, and enjoy planning your session.