Car Camping Set up!

Hello! My group is trying to prepare for our festival setup. We purchased two car camping spots. In 2023 we had to tent camping spots and I’m just wondering if car camping is actually a 20x20 space? So if we came together we’d score a 20x40 lot? Is this accurate? (Like I said in 2023 we had a 12x24 spot so 20x40 seems HUGE) we just want to prepare how many canopy’s/tents we need and can fit! TIA