There should be three or four events for various parts of the country: Southeast, Northeast, West Coast, Midwest, etc.
I would almost definitely go, especially to see some of the rides and meet the folks behind them. It would be nice to have a once a year event, but of course, usually these things cost some money and we'd have to guarantee that enough people would show up to possibly pay a very small entrance fee or registration fee. Of course, one of those tracks mentioned might be fine with having a large group of stangers considering the potential business.
This should happen, eventually.