Not to downplay the Freddies which I attended for the 2nd time, but I think FTer-organized Dos should be the ones that count on this thread, especially since Randy's got staff/its one evening & usually the folk organizing the Community Dos are doing it on their own.
I know that
sandiego1k (London MegaDo) and
bernie (Dus Do) did more than just picking venues, but also did spreadsheets on flights, hotels, websites, etc, & organized multiple days/activities & much more. And in
bernie's case, he actually fronted the $$ for the boat, trams, jazz activities, meals, etc, acting in good faith that we'd pay him (which we did).
Having said that, to the OP, you want to take on organizing a Mega Do, be our guest & look forward to hearing when, where, etc. Those of us who have organized dos large & small know what it takes & salute you for offering