Want to get a visual for what's going on the day of the meets? I threw this together on Google Maps and it's pretty interesting to see how we're covering a wide swath of North America.
Thia map may shows that many states were far from the central point and that may be one adjustment needed. In the west with so much mileage to cover maybe split those states into three equal parts.
Just my opinion , considering turn outs and costs involved.
Also I suggest possibly different weekends so those who wish can travel and maybe attend a few meets each year.