Group join treks have fixed departure dates, while for private treks, departure date can be arranged as per client’s wish. You will be able to customize itinerary, accommodation, and means of transport during the private trek, but the same cannot be done for group treks. Group treks are likely to be cheaper than private treks. Private treks are suitable if you want to spend quality time with yourself, your friends and family. Just the same, group treks are for people who are looking forward to meeting new people.