Please forgive late response I thought bi annual at most. simple theme reasonable achievable end goals in relation to each fellowships position, no trader fees and extended trade within successful associated fellowships might have appeal . find the spy/smuggler or, missing love,treasure etc, low Fellowship gets offended/robbed heart broken lost payroll, mid fellowship investigates and/or the high fellowship investigates/assists/solves dillema for example.Could involve battles with a few new entities.
Thanks for question nice to know you took the time thank you