Option to add more trek friends to our registered trek.

When we register for any trek (individually or as a group), there is no feature to add more trek friends for the same trek, once the booking is done. I feel that option should be made available. At times we book treks well in advance and many times we come across friends who are interested to join but can’t confirm well in advance. This feature can help to add trek friends to the same trek and batch. Especially for first time trekkers, it becomes easier if their experienced trek friend can do the registration part for them by just adding to the group.