Opinions will vary. All depends on your approach to racing. Are you there just to have fun? Maybe win a round or two? Just want to enjoy the day? talk with people etc. Then you wont need too much. But I would say as others did, the basics. Fuel, water, air tank, basic tools, battery charger a must if you have electric fan. And maybe most importantly a Lawn chair! Lots of down time at the track! I used to bring jets, plugs, and extra rocker arms , header gaskets, etc. But trust me most guys at the track will be more than willing to lend you something or help you out, if something goes wrong! Just remember safety is always first. if car is running be in it. If car is jacked up, use jack stands! Oh yeah don't forget tire patch kit..............you never know what you might run over in the pits and slicks pick up everything.