Yes, you can cancel a trip that you booked on LandTrust as long as it's within 48 hours of when the Landowner accepted your booking request and the trip doesn't start within that 48 hour period. If you cancel within that 48 hour period and the trip doesn't start within that 48 hour period, you will receive a full refund.
If you do not cancel within the 48 hour period, you will not receive a refund. This cancellation policy exists to protect Landowners from situations where they may have booked out very desirable dates for a trip only to have the guest cancel last minute and the Landowner's not able to rebook it. Since LandTrust operates in the recreation/experience world, there is specific seasonality which means there are only certain days during a year that the Landowner can generate booking revenues from certain activities.