Have most of y'all been to a home-based Gathering, or most to a festival-based Gathering? They's two different sorts of events-- both are great I am sure-- but what frame of reference are you trying for?

Both of those styles have evolved, rather than springing up whole from virgin ground, so copying them is probably not the best approach; but if you let the nature and extent of your propinquity determine what is possible it will evolve from there.

~Former Gathering Hostess