We have similar stories with Michigan and Charlotte. At times there were about 20 of us tailgating and enjoying the races. Out of that group there are about 4 of us that continue to closely follow NASCAR. The remaining folks were casual fans and just enjoyed the experience. I think that boom period might have had to do with timing of the baby boomers (car people) reaching middle age with some discretionary income. As they aged they lost more interest and the younger generations don't share the same enthusiasm. I doubt NASCAR will ever be more popular than it is today. Not a bad thing, but just the way I see the future unfolding.