Gratuities for guides are appropriate and greatly appreciated as a gesture of thanks for their professionalism and service. The industry standard is 10% of the cost of the trip. Our guides will make every effort to see that your trip is enjoyable and successful. The common practice is to give the gratuity to the trip leader on the last night. It will later be divided equally with the rest of the crew. Paying in cash is the most common form of payment though you can always bring along a check and make it out to the trip leader.