If it ends up being a RTW DO, I presume it will be possible to do just parts of it. In other words, only those who were ticketed on the charter could attend the other "official" DO events, but with a 10-day RTW DO, I don't think it's realistic to expect people to sign on for the entire tour of duty + travel time on the front and/or back ends. I would suggest breaking it up into smaller increments, with the ability to sign up for specific blocks of activities/flights.