Man i have been racing my street driven civic and crx for 6-7 years now. I drove them to the track every time. All i take down there is a jack, some tools (spanners mainly), a set of tyres (so you don't f@#k the ones you drove down on), some extra coolant, extra engine oil, and rags. thats about it i think.
I have never scratched or crashed the car on a track day. The only little problem that i have had down there was the car started to over heat a little because the coolant was leaking out. I missed one run but after a little stuffing around i got out for the next one.

The only thing that i will suggest to you is that you drive within your limits and your cars limits. If you go out there thinking that you are going to be the fastest thing out there you WILL make a mistake.

I was watching a hill climb at Mt Cotton recently, and a guy driving a Evo 8 lancer (who was a unreal driver, he had won the Datton rally in the same car) worth around $120,000 i've since been told. Went out on the track having never driven there before thinking he was the shit and that you could drive fast there straight away, second corner he got wide and put the power down trying to get the car back into line, ended up lossing it, just missed a tree head on, hit a ripple strip and rolled the car 2 times (completely wrote the car off). All because he didn't try to get used to the track.

Mate work your way up to it, sus your car out, sus the track out and don't try anything stupid and you will have a great great time. look forward to hear how you go with it.