gotpez - There isn't much diffrence between a National and a club race at any of the track I have ever raced at. I have raced regularly in Arizona, California and Florida and I have friends that race in just about every state. All of their club races are ULTRA serious.
For Example at my local track everyone has better batteries than most factory drivers (I'm not kidding), they have a dozen packs each, half dozen of the motors of the week, most have 2 turbo 35's or GFX's, a few have Fantom Dynos, 4 have magnet zappers and they bring everything to the track twice a week.
Every time I have run Foam on Carpet I have had to true my tires down to 2.27 to get decent lap time with the car getting faster when the tires got to 2.24. I started at 2.27 to get some life out of them. Everyone else I raced with started at 2.24 right away.
Like I said everywhere I race the racers act like its a national and have no problem dropping tons o' cash to be fast.