In your tent
If however that is not OK for your situation there is a companion parking area but the info says it will probably fill up quickly so who knows how for sure that is when they are doing things somewhat differently this year.
There are a number of threads about this already.
This is what the FAQ page says - Where do people that are staying with me in my RV but driving up separately park for the weekend?
There is a LIMITED amount of overnight parking for companion cars. This parking lot will be a long walk to all the camping areas. There is no close drop point for camping gear. If you are joining your friend(s) who already have a spot set up or you have more than one car with your group of friends sharing a spot, you can park the other vehicle here. It is imperative that all onsite campers carpool and combine into the least number of vehicles. This area WILL fill up. If you move your car from here you may not be able to get a spot when you return. Cars parked in this lot will ONLY be allowed to leave or return between the hours of 2am - 11am starting friday 4/16/10. If you need to leave for good to go home outside of those hours, plan ahead and move your car into regular festival day parking between 9am - 11a.
These lots will be closed to in and out traffic at all other times.
Please note that festival "DAY PARKING" is not for overnight parking or campers and cars will be towed at 3am.
ya im not sure if we got car camping or tent only...i just read the faq after i posted this lol