Trip costs and payment plans vary. Most trips offer the opportunity to pay a deposit to secure a space on the tour and then a payment plan for the balance of the trip minus deposit. These vary by trip, and length of time until registration closes. You will see these payment plan options while registering.
All deposits are non-refundable.
Update August 2021: Until further notice, all trip registrations will NOT require a deposit when registering. Once you have registered, and the trip is confirmed to go, you will be notified and payment options can then be added to your account, or you can choose to pay in full.