nascar radio questions

I am going to Phoenix for my first cup race! I found a couple of websites that list radio frequencies for teams, radio, tv, race control, etc. Does anyone know about the radio & tv frequencies? Is it the full broadcast like I listen to at home? Or, is it just the channel used when announcers talk with a driver during the race?

If it is just the brief conversations between announcers and drivers, then is there a local low power AM/FM signal from MRN (PRN) at each race? Should I take a small AM/FM radio in addition to the scanner?

Thanks!