This would also work if people would use the events calendar. Perhaps if each user would add the state or location before the title in the events calendar that would make it very easy and avoid perhaps a redundant forum?

Example: NY - WRAM Show...
Example: WI - Swap Meet....

Just put these headings before the event and than into the calendar. Simple and you can see all events at a glance.

I don't mind the dedicated per state/country forum as long as I can get it so it doesn't slow anything down or add clutter to the lists. Ideally a popup list above the calendar to view just those events that are in the location of your choice...For example you pick "NY" and the calendar filters out all events for just new york.