The swap is nowhere as big as the Nats. The show side is decent but not huge. It is geared more for racing. In years past I used to make quite a few fun runs. Now lucky to get even one.
If you have to choose between the Nats or this, go Nats. Unless you are a racer. Norwalk (Summit) is a better track than National Trail. 100% paved pits and facilities. Natl Trail has declined since the NHRA took over and they don't put any money into it.