If an annual set location is desired, go to the AVR. It's in the same place every year and the weekend, I believe is the same every year. If that is not good enough, you can go to one of the regional events, which are usually set weekends.
As for national, I LOVE that it moves around. As has been said, it give us an opportunity to see other parts of the country. If the date was the same every year, it might exclude an area due to other local events for that area.
This years national meet allowed me and 12 others from 3 different chapters to ride together to the northwest part of the country and hit Sturgis on the way home in the same trip. If the dates were spaced out, not sure if we would have had as many go with us. Not every year is that going to work out this way. But let me just say that I think it was a trip of a lifetime. We saw about as much as you could see in 2 weeks go to and coming from. We just didn't have enough time in Sturgis to do all we wanted to do. That'll be a another trip. Maybe in 2 years for the Sturgis' 75th anniversary...
I would urge the BOD to keep the flex dates and location for the national meet. It would be great if we could get the location determined 2 years out, but that is me being selfish.