Regular parking to Campsite 1-4

Hi everyone, hoping someone may be able to answer this query. I did try to find the answer already but couldn't spot it on the sub.

I'm driving to defqon next week, but my friends are all getting transfers / bus / train and will be camping in campsites 1 - 4.

Reading the online info it looks like people arriving by car can only access 5 - 6. I obviously want to camp with my buddies - does anyone know if this is possible?