Tips are not included as part of the trip as it is a personal choice how much you tip.
Tipping is part of the culture in most parts of the world and tips are used to show gratitude and satisfaction with a service. Tipping your Pack Leader and any additional guides or drivers is greatly appreciated but not compulsory. Tips are often of considerable significance to the people who help run your trip and let them know their services and efforts are appreciated.
The amount you tip is entirely at your own discretion, however, you will find some guidance in the pre-trip information you are sent before your trip.