Before going on a trip together with family or friends, you can create an itinerary in advance and then allow those members who havent been involved in the planning process to join the group when its time to depart. This way, they wont keep asking questions.
Professional tour guides and team leaders can have the administrative staff create the itinerary beforehand and then join the team. When the journey begins, they can invite the team members to join, reducing the need for everyone to carry a bunch of guidebooks.
Managers, secretaries, assistants, and others can plan important long-distance trips in advance and then invite the necessary personnel to join the team, thereby consolidating everyones itinerary.