What appened to the "Nats"

Yes, I'm glad I didn't make a special trip...550 miles one way as I would have been very disappointed. I've been going to Carlisle...180 miles, which is always fun. The past few years it's been hot as hell and there seemed to be quite a few empty spots, especially this year. Combine that with gas, tolls, hotel. I sometimes wonder if it's still worth it...