I had the idea years back to regionalize subsim meets for the USA at least
Subsim South Central for example would be TX, OK, LA, AR
Subsim southeast could be MS, AL, FL, GA, SC
and so on... you could designate a "moderator team" in each region who could be relied upon to ensure that group meet ups represent subsim well and coordinates the meetups annually or semi annually
that makes it easier for members to participate in meets when they just have to travel a relatively short distance.
EDIT: and there would be something regionally located for every region to do
South Central would have the subarine in eastern oklahoma, the ww2 museum in new orleans, the pacific war musum, the carrier, the uss texas etc in texas... the list goes on
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