My family and I go to the race at Infineon Raceway every year (Sears Point, Sonoma, California.).
Tix are $95 a piece x5 tix. It ain't cheap! But we go every year, and are entertained. Something about watching those guys turn right, and left is pretty darn exciting.
With that said, I wouldn't pay $20 to go watch them race at California Speedway, Las Vegas, Chicago, Michigan, Pocono, Kansas, or any "cookie-cutter" type track. IMO they got away from what made them famous, and that was the beating and banging you find at short tracks. Get back to that, and let the drivers fight it out and it will get more entertaining.