Leave your stuff at the track if you can, then get your room to snooze for the night.
The track is behind a gate, secured and monitored with a guard on duty all weekend long. The facility also has a guard on patrol all night long as well as all the NESBIANs camping at the track. Your stuff couldn't be safer.
Besides, then you don't have to unhook, unload and unpack in the morning. Just wake up, freshen up in the powder room, grab some breakfast and hop in the car and come to the track. Stuff your body in to your gear, roll through tech and you're ready to have a fun day.