Walking Tree expects its participants to behave in a manner consistent with a successful group dynamic and safe travel. The use of tobacco, alcohol or illegal drugs is prohibited. If a participant acts in a way that the leaders decide is seriously destructive to him or herself, the group or anyone associated with Walking Tree, we reserve the right to send the offender home without a refund. Participants who return home from Costa Rica during the program, whether by their own volition, medical complications, or because Walking Tree terminates their program, will not receive a refund and will be responsible for all costs incurred with an unscheduled return.